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Jack Rabbit

(45,984 posts) Mon Apr 1, 2013, 03:37 PM Apr 2013

Chess (April): Magnus and Kramnik both lose in final round; Magnus to face Anand in November

[font size="4"]Magnus and Kramnik both lose in final round[/font]
[font size="3"]Magnus wins on tie breaks, to face Anand for world title in November[/font]

[center][/center]

[center]The Unpredictable Vassily Ivanchuk, Tournament Spoiler[/center][font size="1"]Photo by Stefan64 (http://commons.wikimedia.org/wiki/User:Stefan64) in Wikimedia Commons (http://commons.wikimedia.org/wiki/Category:Vassily_Ivanchuk) (http://creativecommons.org/licenses/by-sa/3.0/deed.en|Creative Commons License] Attribution/Share Alike)]
[/font]
Magnus Carlsen, the highest rated chess player in history, and former world champion Vladimir Kramnik both lost their respective games in the final round to, respectively, Peter Svidler and the unpredictable Vassily Ivanchuk, to give Magnus to tournament championship by tie breaks in the Candidates' Tournament in London, earning the right to challenge reigning world champion Vishy Anand to a match for the world title in November.

First a disclaimer: This is not an April Fools' Day joke.

Both Magnus and Vladimir Borisovish finished with 8½ points each in 14 rounds. Levon Aronian, the third rated player in the world behind Mangnus and Vladimir Borisovich and who appeared to be Magnus' main rival at the half-way point in the tournament, finished tied for third with reigning World Cup champion Svidler with 8 points each.

Magnus, playing White, was sailing along with a slightly better game after 30 moves against Peter Veniaminovich when he began making a series of of inferior plays. On his 35th move with Peter Veniaminovich now holding a small advantage, Magnus, in check from Black's Queen, interposed his own Queen with a tacit proposal of an exchange. Peter Veniaminovich postponed the Queen exchange to win a pawn, opening a file and forcing an exchange of Rooks that moved Black's King into the center. When the Queens were exchanged, Peter Veniaminovich found himself in a superior endgame with an extra pawn, a centralized King and the Bishop pair. Peter Veniaminovich ground Magnus down until the 48th move, when Magnus resigned a hopeless position.

This opened the way for Vladimir Borisovich to take the tournament title himself by merely drawing his game against Vassily Ivanchuk, the Dr. Jekyll and Mr. Hyde of chess. Vassily Mikhailovich had both his aspects on display in London, losing four games on time but beating Magnus in the 12th round last Friday and coming close to beating him in the fifth round. Vassily Mikhailovich, playing White, wore his genius hat today and outplayed Vladimir Borisovich from start to finish, beating the former world champion in 41 moves.

The tie break system in London gave Magnus the tournament championship. The first tie break was head-to-head scores among those in the same point bracket (Magnus and Vladimir Borisovich drew both their game against each other) and the second was games won. Magnus finished the event with five wins, two losses and seven draws while Vladimir Borisovich had 4 wins, one loss and eight draws.

It was a remarkable tournament comeback for Vladimir Borisovich, who drew all seven of his games in the first half of the tournament but then won four of his next five games.

Negotiations between representatives of Magnus and Anand for a tournament site, prize funds and specific rules for the tournament will begin shortly under the auspices of FIDE.
[center]
FIDE CANDIDATES' TOURNAMENT
London, March 15-April 1, 2013
Final standings
[font face="courier"]
Rank Name . . . . . . . . . 1 . . 2 . . 3 . . 4 . . 5 . . 6 . . 7 . . 8 . . Pts . TB1 . .+ . - . .=
1 .. Magnus Carlsen . . . . * * . ½ ½ . 1 0 . ½ ½ . 1 1 . 1 ½ . ½ 0 . ½ 1 . 8½ . . 1. . . 5 . .2 . .7
2 .. Vladimir Kramnik . . . ½ ½ . * * . ½ 1 . ½ 1 . ½ ½ . ½ 1 . ½ 0 . ½ 1 . 8½. . .1. . . 4 . 1 . .9
3 .. Peter Svidler. . . . . 0 1 . ½ 0 . * * . ½ 1 . ½ ½ . ½ ½ . ½ 1 . 1 ½ . 8 . . .1½ . . 4 . 2 . .8
4 .. Levon Aronian. . . . . ½ ½ . ½ 0 . ½ 0 . * * . 1 0 . ½ ½ . 1 1 . 1 1 . 8 . . ..½ . . 5 . 3 . .6
5 .. Boris Gelfand. . . . . 0 0 . ½ ½ . ½ ½ . 0 1 . * * . ½ ½ . ½ ½ . ½ 1 . 6½. . .1. . . 2 . 3 . .9
6 .. Alexander Grischuk . . 0 ½ . ½ 0 . ½ ½ . ½ ½ . ½ ½ . * * . ½ 1 . ½ ½ . 6½. . 1. . . 1 . 2 . 11
7 .. Vassily Ivanchuk . . . ½ 1 . ½ 1 . ½ 0 . 0 0 . ½ ½ . ½ 0 . * * . 0 1 . 6 . . .-- . 3 . 5 . .6
8 .. Teimour Radjabov . . . ½ 0 . ½ 0 . 0 ½ . 0 0 . ½ 0 . ½ ½ . 1 0 . * * . 4 . . .-- . 1 . 7 . .6
[/font][/center]

13 replies

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Highlight:

Chess (April): Magnus and Kramnik both lose in final round; Magnus to face Anand in November (Original Post) Jack Rabbit Apr 2013 OP

Games from March Jack Rabbit Apr 2013 #1

FIDE Candidates' Tournament, London Jack Rabbit Apr 2013 #2

Svidler - Carlsen, Round 6 Jack Rabbit Apr 2013 #3

Aronian - Kramnk, Round 12 (Opening theory: QG Semi-Normal (Semi-Tarrasch) Defense) Jack Rabbit Apr 2013 #4

Nevermind . . . Jack Rabbit Apr 2013 #11

World Women's Team Championship, Astana, Kazakhstan Jack Rabbit Apr 2013 #5

Kurtsidze (Georgia) - M. Muzychuk (Ukraine), Round 7 (Opening Theory; Indian QG/Calcutta Opening) Jack Rabbit Apr 2013 #6

Ni (United States) - Zhukova (Ukraine), Round 8 (Opening Theory: Tal-Indian/Pawn Storm Opening) Jack Rabbit Apr 2013 #7

C. Foisor (Romania) - Ju Wenjun (China), Round 6 Jack Rabbit Apr 2013 #8

Tan Zhongyi (China) - Dinara Saduakassova (Kazakhstan), Round 7 Jack Rabbit Apr 2013 #9

Girya (Russia) - Benmesbah (France), Round 5 Jack Rabbit Apr 2013 #10

29th International Open, Cappelle-la-Grande, France Jack Rabbit Apr 2013 #12

Papin - Sjugirov, Round 6 Jack Rabbit Apr 2013 #13

Jack Rabbit

(45,984 posts)

1. Games from March

Reply to Jack Rabbit (Original post)

Fri Apr 12, 2013, 03:26 AM

Apr 2013

[center]The JR Chess Report and Gloat Free Scores theme music:[/center][center]Merrick, The Look Sharp, Be Sharp March (From a broadcast of The Gillette Cavalcade of Spots).[/center]

[center]

[/center]

Your humble hare acknowledges the assistance of Houdini 3 x64, Rybka 4.1 x64 and Fritz 13 on analysis.

Diagrams on the Jack Rabbit Chess Report are made with Aquarium, a commercially available interface for Rybka.

Diagrams and other images are hosted on imgur.com.
[center]
BLACK

WHITE
White to move
(This position is a theoretical draw)
[/center]

I would like to thank my impressive and loyal staff: Buccaneer, Spitfire, Desperado, Swashbuckler, Pancho and Robin Hood.

Jack Rabbit

(45,984 posts)

2. FIDE Candidates' Tournament, London

Reply to Jack Rabbit (Reply #1)

Fri Apr 12, 2013, 03:27 AM

Apr 2013

[center][/center][font size="1"]Photo by Diliff http://commons.wikimedia.org/wiki/User iliff) in Wikipedia
([link:creativecommons.org/licenses/by-sa/2.5/deed.en|Creative Commons License], Attribution/Share Alike)
[/font]

Jack Rabbit

(45,984 posts)

3. Svidler - Carlsen, Round 6

Reply to Jack Rabbit (Reply #2)

Fri Apr 12, 2013, 03:29 AM

Apr 2013

In addition to being the official FIDE challenger for Vishy Anand's world title and the top ranked chess master in the world, Magnus was named last week by Cosmopolitan magazine as the fifth ranked sexiest man of 2013 in a list of 25.

[center][/center]

[center]Magnus Carlsen[/center][font size="1"]Photo by Stefan64 (http://commons.wikimedia.org/wiki/User:Stefan64) from Wikipedia
(Creative Commons License, Attribution/Share Alike)
[/font]

Peter Svidler - Magnus Carlsen
FIDE Candidates' Tournament, Round 6
London, 21 March 2013

Grand Spanish Royal Game: Clam Opening/Kasparov Variation

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.d3 b5 7.Bb3 d6 8.a4 b4

For notes on this opening, see Hou Yifan-A. Muzychuk, Grand Prix W, Rostov-on-Don, 2011

9.Nbd2 0-0 10.a5

If [font color="red"]10.Re1 Be6 11.a5[/font] then:

If [font color="red"]11...Qc8 12.Nc4 Rb8[/font] then:

If [font color="red"]13.h3 h6 14.Be3 Rd8 15.Qe2 Bf8 16.Nfd2[/font] then:

If [font color="red"]16...Ne7 17.d4 Ng6 18.d5 Bd7[/font] then:

[font color="red"]19.Ba4 Bb5 20.b3 Be7 21.Rec1 c6 22.Bxb5 Rxb5 23.Nb6 Qb7 24.dxc6 Qxc6 25.Qc4[/font] draw (Adams-Anand, World Ch Trmt, San Luís, 2005).
[font color="purple"]19.Rec1 Re8 20.c3 Nf4 21.Qd1 Qd8 22.Ba4 Qe7 23.b3 g6 24.Nb2 Rec8 25.Bxd7 Qxd7 26.c4 Qe8 27.Qf1[/font][/font] draw (Karjakin-Aronian, Corus A, Wijk aan Zee, 2006).

[font color="darkorange"]16...Qb7 17.Qf3 Kh7 18.Nf1 Ne7 19.Ng3 Ng6 20.Nh5[/font] draw (Aronian-Svidler. IT, Linares, 2006).

[font color="magenta"]13.Bg5 Kh8 14.d4 exd4 15.Nxd4 Nxd4 16.Qxd4 Ng8 17.Bf4[/font] gives White the advantage in space (Leko-Anand, Amber Rapid, Monte Carlo, 2006).

[font color="darkred"]11...Rb8 12.Bc4 Qc8 13.Nf1 h6 14.Ne3 Re8 15.Nd5 Bd8 16.c3 bxc3 17.bxc3 Bxd5 18.exd5 Ne7[/font] is equal (Atakisi-Shimoev, Euro Ch, Istanbul, 2003).

10...Be6 11.Nc4 Rb8 12.c3

If [font color="red"]12.Be3 Qc8[/font] then:

[font color="red"]13.h3 Qb7 14.Qe2 h6 15.Rfe1 Nd7 16.Nfd2 Bf6[/font] is equal (Pogonina-T. Kosintseva, OlW, Khanty-Mansiyk, 2010).
[font color="darkred"]13.Re1 h6 14.Qe2 Nd8 15.Nfd2 Ng4 16.h3 Nxe3 17.Nxe3[/font] is equal (Landa-Jakovenko, Aeroflot Op, Moscow, 2006).

12...bxc3 13.bxc3 h6

If [font color="red"]13...Bg4 14.Ba4 Na7 15.Ne3[/font] then:

[font color="red"]15...Be6 16.Ng5 Bd7 17.Bxd7 Nxd7 18.Nf3 Nc6 19.Nd5[/font] gives White a small advantage in space (Grischuk-Bacrot, Tal Mem Blitz, Moscow, 2007).
[font color="darkred"]15...Nb5 16.Nxg4 Nxg4 17.Qc2 Nf6 18.Bb3 c5 19.Bd2[/font] gives White a slight advantage in space (Meszaros-Drkulec, Canadian Op, Toronto, 2011).

14.Re1 Qc8 15.Bc2 (N)

If [font color="red"]15.Ba3 Rd8[/font] then:

If [font color="red"]16.Qc2 Bf8 17.Nfd2 Na7[/font] then:

[font color="red"]18.Ne3 Bxb3 19.Nxb3 Qd7 20.Nd2 Rb5 21.d4 Rdb8[/font] is equal (Kasimdzhanov-Sargissian, Bundesliga 0506, Germany, 2005).
[font color="magenta"]18.d4 exd4 19.cxd4 d5 20.exd5 Rxd5 21.Bxf8 Qxf8[/font] gives White a small advantage in space (Grischuk-Zhao Xue, World ChT, Beer Shiva, 2005).

[font color="darkred"]16.Ba4 Bxc4 17.Bxc6 Bb5 18.Bxb5 Rxb5 19.c4 Rxa5[/font] gives Black an extra pawn, but White holds more space (Sebag-Karjakin, Rpd Op, Mainz, 2007).

15...Rd8

The game is equal.
[font color="red"]15...Bxc4 16.h3 Qb7 17.dxc4 Nd7 18.Be3 Rfd8 19.Nh2[/font] is equal.

16.Qe2!?

White plays a slight inaccuracy, perhaps deliberately in order to throw Black off balance.
If [font color="red"]16.Ne3 Nh7 17.Nd5[/font] then:

[font color="red"]17...Nf6 18.Ne3 d5 19.Nxd5 Nxd5 20.exd5 Rxd5 21.Ba4[/font is equal.
[font color="darkred"]17...Bf6 18.d4 Ne7 19.Nxe7+ Bxe7 20.Qe2 Bg4 21.Bd3[/font] is equal.

16...Bf8!?

White eschews an opportunity to deal structural damage to White's center.
[font color="red"]16...Bxc4! 17.dxc4 Qe6 18.c5 Rb5 19.cxd6 Qxd6[/font] gives Black a slight edge.

17.Ne3!

The game is equal.
17...d5 18.exd5

If [font color="red"]18.Nxd5 Nxd5 19.exd5 Bxd5 20.Nxe5 Nxe5 21.Qxe5[/font] then:

If [font color="red"]21...Re8 22.Qxe8[/font] then:

[font color="red"]22...Qg4 23.Qe4 Bxe4 24.Rxe4 Qd7[/font] gives Black the Queen for a Rook, Bishop and pawn.
[font color="burgundy"]22...Qxe8?! 23.Rxe8! Rxe8 24.Be3 Be6 25.Rb1 Bd7 26.Bf4[/font] leaves White with an extra pawn.

If [font color="darkred"]21...Bxg2 22.Kxg2 Re8 23.Qxe8 Qg4+ 24.Kf1 Qh3+[/font] then:

[font color="darkred"]25.Kg1 Qg4+ 26.Kh1 Qf3+ etc.[/font] is perpetual check.
If [font color="magenta"]25.Ke2??[/font] then Black wins after [font color="magenta"]25...Rxe8+!.[/font]

18...Nxd5 19.Nxd5 Rxd5!?

The Rook was better posted on the back rank, as Rooks often are at this stage of the game. Better is to use a minor piece as a shock troop when a pawn is not available.
[font color="red"]19...Bxd5 20.h3[/font] then:

[font color="red"]20...Re8 21.Qd1 Re6 22.Ra4 Qd7 23.Nh4 Rf6[/font] gives Black a small advantage in space.
[font color="darkred"]20...Rd6 21.d4 Bxf3 22.Qxf3 exd4 23.Ba3 Rf6 24.Qd3 g6[/font] gives Black a slight edge.

[center]BLACK: Magnus Carlsen[/center]

[center][/center]

[center]WHITE: Peter Svidler[/center][center]Position after 19.Rd8d5:N[/center]

20.h3!?

White plays passively and misses a good opportunity to turn the tables on Black.
[font color="red"]20.Qe4! f5 21.Qe2 Rc5 22.Bd2 Bd6[/font] then:

[font color="red"]23.d4 Nxd4 24.Nxd4 exd4 25.Qxe6+ Qxe6 26.Rxe6[/font] gives White a slight advantage in space.
[font color="darkred"]23.c4 Nb4 24.Bxb4 Rxb4 25.Nd2 Kh8 26.Nb3[/font] gives White a slight advantage in space.

20...Bf5!

Black has a small advantage in space.

21.Rd1 Qe6 22.Bb1 Qd7 23.Be3

he Bishop doesn't appear to have much of a future from e3.
If [font color="red"]23.Bc2 Qe6 24.Nh4 Bh7 25.Nf3 Rc5 26.Qe1 Rd5[/font] continues to give Black a small advantage in space.

23...e4 24.Nd4 Nxd4 25.Bxd4?

White tries to avoid structural damage by recaputring with the Bishop.
If [font color="red"]25.cxd4[/font] then:

If [font color="red"]25...exd3 26.Bxd3 Bxd3[/font] then:

If [font color="red"]27.Qxd3 28.Rc3 (Rbb5 28.Rdc1 Rxa5[/font] then:

[font color="red"]29.Rxa5 Rxa5 30.Qc3 Ra3 31.Qxc7 Qxc7 32.Rxc7 Ra1+[/font gives Black a slight advantage.
If [font color="darkred"]27.Rxd3!? Rbb5![/font] then:

[font color="darkred"]28...Rxa5 29.Rac1 Bd6 30.Rc4 Ra3 31.R4c2 Qe6[/font] gives Black a powerful game with an extra pawn and more activity for his pieces.
[font color="burgundy"]29.Qc3!? Rxa1 30.Rxa1 Qc8! 31.Qc6 Rd6 32.Qe4 Re6[/font] gives Black an extra pawn and the initiative.

[font color="magenta"]a) 28.Rad1 Rxa5 29.Qc2 Bd6 30.Rb3 Qf5 31.Qxf5 Rxf5[/font] gives Black an extra pawn.
If [font color="darkorange"]b) 28.Qd2 Qf5 29.Bf4 c5 30.Bc7 c4[/font] then:

[font color="darkorange"]31.Rf3 Rb1+ 32.Kh2 Qxf3 33.gxf3 Bd6+ 34.Bxd6 Rxa1[/font] leaves Black a Rook to the good.
If [font color="purple"]31.Re3 Bc5[/font] then:

[font color="purple"]32.Re8+ Kh7 33.Re5 Rxd4 34.Qxh6+ Kxh6 35.Rxf5 c3[/font] gives Black a stong advantage; White must drop what he is doing and defend against the passed pawn.
[font color="hotpink"]32.Be5 f6 33.Qe2 Bb4 34.Bc7 Rxd4 35.Bb6 Rd3[/font] gives Black a powerful passed pawn.

If [font color="darkred"]25...Bxh3?! 26.dxe4![/font] then:

[font color="darkred"]26...Rh5 27.Qxh5 Bg4 28.Qd5 Qxd5 29.exd5 Bxd1 30.Bd3[/font] wins a pawn.
[font color="magenta"]26...Rdb5? 27.gxh3 Qxh3 28.e5! c5 29.Bd3 Rb4 30.Bf4[/font] gives White a mobile center and well-placed Bishops; this is a winning position.

[center]BLACK: Magnus Carlsen[/center]

[center][/center]

[center]WHITE: Peter Svidler[/center][center]Position after 25.B d4:N[/center]

25...exd3?

Black underestimates or overlooks the simplest reply.
If [font color="red"]25...Bxh3!![/font] then:

If [font color="red"]26.dxe4[/font] then Black wins after [font color="red"]26...Rg5 27.g3 Bg4 28.f3 Rb2!! 29.Qxb2 Bxf3[/font] when he has an extra pawn and has stripped the White King of his castle wall.
[font color="darkred"]26.gxh3? Qxh3 27.f4 exf3 28.Qh2 Rg5+[/font] leads to mate.

26.Bxd3!

Black still has a small advantage in space.

26...Bxd3 27.Rxd3 c5

If [font color="red"]27...Re8 28.Qf3 Bd6 29.Rdd1[/font] then:

If [font color="red"]29...Rd8 30.c4 Rxd4 31.Rxd4 Bh2+ 32.Kxh2 Qxd4[/font] continues to give White a small advantage with the initiative.
If [font color="darkred"]29...Qe6!? 30.Qe3![/font] then:
- [font color="darkred"]30...Qxe3 31.Bxe3 Rb5 32.c4 Rb4 33.c5 Be5[/font] continues to give Black a small advantage in space.
- If [font color="magenta"]30.Kf1!? Rg5 31.Qe3 Qc4+ 32.Qd3 Qc6 33.f3 Bg3[/font] gives Black a fair advantage with greater freedom.

28.Be5 Rxd3 29.Bxb8 c4 30.Be5!?

The Bishop heads for d4.
If [font color="red"]30.Qe1 Qd5 31.Bc7 h5 32.Rb1 Bc5 33.h4 Kh8[/font] continues to give Black a small advantage in space.

[center]BLACK: Magnus Carlsen[/center]

[center][/center]

[center]WHITE: Peter Svidler[/center][center]Position after 30.Bb8e5[/center]

30...Bc5!

Black finds an active post for his Bishop and prevents 31.Bd4.
If [font color="red"]30...Qe8!?[/font] then [font color="red"]31.Re1! f6 32.Bd4 Qxe2 33.Rxe2 Rd1+ 34.Kh2[/font] equalizes.

31.Rb1

[font color="red"]31.Rc1 Qe6 32.Re1 f6 33.Bf4 Qxe2 34.Rxe2 Rxc3[/font] gives Black an advanced passer.
[font color="blue"]31.Bd4?! Bxd4 32.cxd4 Rxd4 33.Rc1 Qd5![/font] leaves Black a pawn to the good.

31...Qd5 32.Rb8+?!

White hits the panic button too soon and goes in for complications.
The Rook does better to stay back in order to aid the defense.
If [font color="red"]32.Re1 f6[/font] then:

If [font color="red"]33.Bc7 Rxc3 34.Qe6+ Qxe6 35.Rxe6[/font] then:

If [font color="red"]35...Ra3[/font] then:

[font color="red"]36.Rc6 Ra1+ 37.Kh2 Bb4 38.Rxa6 Bd2 39.Kg3 c3[/font] continues to give Black the initiative as his pawn is closer to queening than White's pawn.
[font color="burgundy"]36.Kf1 Ra2 37.Rc6 Rxf2+ 38.Ke1 Rf5 39.Kd1 c3[/font] leaves Black two pawns to the good; White still has some active play.

If [font color="darkred"]35...Rc1+ 36.Kh2 c3 37.Rxa6 c2 38.Bf4[/font] then:

[font color="darkred"]38...Rd1 39.Rc6 Bd6 40.Bxd6 c1Q 41.Rxc1 Rxc1[/font] leaves Black with the exchange for a pawn, but it is a passer and White can make something of it.
If [font color="magenta"]38...Ra1[/font] then after [font color="magenta"]39.Rc6 Rxa5 40.g3 h5 41.Kg2 Kf7[/font] Black will find it difficult to make that last step.

If [font color="darkred"]33.Bf4 Rxc3[/font] then:

[font color="darkred"]34.Qe6+ Qxe6 35.Rxe6 Ra3 36.Rxa6 c3 37.Kf1 g5[/font] gives each side a passer, but each should be able to stop the other's.
[font color="magenta"]34.Qe8+ Kh7 35.Qe6 Qxe6 36.Rxe6 Ra3 37.Rxa6 Ra1+[/font] wins the f-pawn.

32...Kh7 33.Qh5?

This is a blunder.
It's still a game after [font color="red"]33.Re8[/font] when [font color="red"]33...Qd7 34.Rb8[/font] then:

If [font color="red"]34...Qd5 Rxe5 35.Re8 Qd7 36.Rb8 Rd2 37.Qe4+ f5[/font] gives Black an impressive advantage, but White still has counterplay.
If [font color="darkred"]34...f5 35.Kh2 Qe7 36.f4 Re3 [/font] then:

[font color="darkred"]37.Qxc4 38.fxe5 Qxe5+ 39.g3 Bg1+ 40.Kxg1 Qxg3+[/font] gives Black an extra pawn.
[font color="magenta"]37.Qf1 Rxe5 38.fxe5 Qxe5+ 39.g3 Bg1+ 40.Kxg1 Qxg3+[/font] gives Black an extra pawn after 41...Qxb8 42.Qxf6+ Kh8

[center]BLACK: Magnus Carlsen[/center]

[center][/center]

[center]WHITE: Peter Svidler[/center][center]Position after 33.Qe2h5[/center]

33...Qe4!

There is nothing White can do to stop Black from raiding the back rank with his heavy pieces.

34.Rb2

If [font color="red"]34.Kh2 Rd5 35.Re8 Bxf2 36.Qf3 Qxf3 37.gxf3[/font] gives White an extra pawn.

34...Rd5 35.Re2 Qb1+ 36.Kh2 f6 0-1

If [font color="red"]37.Qg4[/font] then [font color="red"]37...Rxe5! 38.Qxc4 Rxe2 39.Qxe2[/font] leaves Black a piece to the good.
Peter Veniaminovich resigns.

Jack Rabbit

(45,984 posts)

4. Aronian - Kramnk, Round 12 (Opening theory: QG Semi-Normal (Semi-Tarrasch) Defense)

Reply to Jack Rabbit (Reply #2)

Fri Apr 12, 2013, 09:07 PM

Apr 2013

Vladimir Kramnik, world champion from 2000 to 2007, drew all of his games in the first half of tournament. Hardly satisfied, he came storming back in the second half, winning four games and overtaking Magnus Carlsen by winning this game. This game virtually ended the chances of Levon Aronian, , who was Magnus' main rival during the first half in London.

[center][/center]

[center]Vladimir Kramnik[/center][font size="1"]Photo by steenslag from flickr as resized in Wikimedia Commons (http://commons.wikimedia.org/wiki/File:Vladimir_Kramnik_2005.jpg)
(Creative Commons License, Attribution/Share Alike)
[/font]

Levon Aronian - Vladimir Kramnik
FIDE Candidates' Tournament, Round 12
London, 29 March 2013

Orthodox Queen's Gambit: Semi-Normal Defense (Exchange Opening/Main Line) (Semi-Tarrasch Defense)

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Orthodox Queen's Gambit: Semi-Normal Defense[/center][center]Position after 4...c5[/center]

The Semi-Normal Defense, conventionally known as the Semi-Tarrasch Defense, was often seen in the twentieth century, but is less popular now. The position is older than the Normal Defense (Tarrasch Defense), 1.d4 d5 2.c4 e6 Nc3 c5, having debuted in the Macdonnell-Labourdannais match of 1834.
The obvious idea of this set up for Black is to retain some of the piece activity inherent in the Normal Defense while avoiding the strategic burden of the isolated d-pawn.

5.cxd5

This is the main line.
[font color="red"](Exchange Opening)[/font]If [font color="red"]5.e3[/font] is an alternative: [font color="red"]5...Nc6 6.a3[/font] (6.cxd5 Nxd5 transposes into the text) then:

If [font color="red"]6...Ne4 7.Qc2 Nxc3[/font] then:

If [font color="red"]8.bxc3 Be7[/font] then:

If [font color="red"]9.Bb2 0-0 10.Bd3 h6 11.0-0 Na5[/font] then:

If [font color="red"]12.Nd2 dxc4 13.Nxc4 Nxc4 14.Bxc4 b6[/font] then:

[font color="red"]15.e4 Bb7 16.Qe2 Rc8 17.Bb3 b5 18.f4 Qb6[/font] is subtly advantageous for Black; White must be careful that Black's spacial plus on the queen does not incapacitate his Bishops (Petrosian-Fischer, Candidates' Final Match Rd 8, Buenos Aires, 1971).
[font color="burgundy"]15.Rfd1 cxd4 16.cxd4 Bb7 17.Qe2 Rc8 18.Rac1[/font] draw (Benko-Ivkov, IT, Wijk aan Zee, 1972).

[font color="#D0A020"]12.cxd5 exd5 13.Ne5 Bd6 14.f4 Bxe5 15.fxe5 c4[/font] is equal (Gheorghiu-Tringov, IT, Romania, 1971).

If [font color="darkred"]9.Bd3 dxc4 10.Bxc4 0-0 11.0-0[/font] then:

If [font color="darkred"]11...Qc7 12.Bd3 h6[/font] then:

If [font color="darkred"]13.Bb2[/font] then:

[font color="darkred"]13...Bd6!? 14.c4 e5 15.dxc5 Bxc5 16.Be4 Re8 17.h3[/font] gives White a slight advantage in space (Ye Rongguang-Adianto, ZT, Kuala Lampur, 1990).
[font color="purple"]13...b6 14.Be4 f5 15.Bd3 Na5 16.Qe2 Bb7 17.e4[/font] is equal.

[font color="darkorange"]13.e4 Bd7 14.Rb1 a6 15.d5 exd5 16.exd5[/font] gives White a small advantage in space (Rubinstein-Levitsky, IT, Lodz, 1906).

[font color="magenta"]11...b6 12.Rd1 Qc7 13.Bd3 h6 14.e4 Na5[/font] give Black a slight edge in space (Stahlberg-Böök, Euro Club Cup, Stockholm, 1960).

If [font color="darkred"]8.Qxc3 cxd4 9.exd4[/font] then:

If [font color="darkred"]9...dxc4 10.Bxc4 Be7 11.0-0 0-0 12.Be3[/font] then:

[font color="darkred"]12...Bd7 13.b4 Rc8 14.Qd3 Bf6 15.Rac1 Ne7 16.Ng5 Nf5 17.Ne4[/font] is equal (Dr. Vidmar-Rubinstein, IT, Karlsbad, 1907).
[font color="burgundy"]12...Bf6 13.Rac1[/font] draw (R. Hernandez-Andersson, IT, Banja Luka, 1979).

If [font color="magenta"]9...Be7 10.c5[/font] then:

If [font color="magenta"]10...a5 11.Bb5 Bd7 12.0-0 0-0[/font] then:

If [font color="magenta"]13.Bf4 a4 14.b4 axb3 15.Qxb3[/font] then:

[font color="magenta"]15...Na5 16.Qd3 Nc4 17.a4 Re8 18.Qb3 Bc6 19.Ne5[/font] gives White a clear advantage in space, but Black is poised for a counterattack on the center (Mikhalchishin-Farago, Slovenian ChT, Bled, 2001).
[font color="hotpink"]15...Bf6 16.Rfd1 Na5 17.Qb4 Bxb5 18.Qxb5 Ra7 19.Bd6[/font] leaves White with a spatial advantage and ready to counterattack (Shashin-Averbakh, Soviet Ch, Yerevan, 1965).

[font color="purple"]13.Re1 a4 14.Qc2 b6 15.Bxc6 Bxc6 16.Ne5 Bb5[/font] gives Black a slight advantage if he opens the quwwnside, but White gets the upper hand otherwise (Hebert-Spraggett, Match, Quebec, 1980).

[font color="darkorange"]10...0-0 11.b4 a6 12.Bf4 f6 13.Rd1 Kh8 14.Be2[/font] gives White a small advantage in space (Petrosian-Olafsson, IT, Los Angeles, 1963).

If [font color="darkred"]6...a6 7.dxc5 Bxc5 8.b4 Bd6 9.Bb2 0-0[/font] then:

If [font color="darkred"]10.Qd2!? Qe7 11.Bd3 dxc4 12.Bxc4 b5[/font] then:

If [font color="darkred"]13.Bd3 Rd8 14.Qe2 Bb7 15.0-0 Ne5[/font] then:

If [font color="darkred"]16.Nxe5 Bxe5 17.f4 Bc7[/font] then:

[font color="darkred"]18.e4!? Rac8![/font] (Black's forces are now gathering near the breach on the queenside) then:

If [font color="darkred"]19.e5?[/font] then:

If [font color="darkred"]19...Bb6+! 20.Kh1 Ng4 21.Be4 Qh4[/font] then:

[font color="darkred"]22.g3[/font] (this may be a harikari move, to which Black responds with one of the most spectacular finishes in the annals of chess) [font color="darkred"]Rxc3!![/font] (Wow. Just wow.) [font color="darkred"]23.gxh4 Rd2! 24.Qxd2 Bxe4+ 25.Qg2 Rh3!![/font] White resigns as he must either lose the Queen or submit to mate (Rotlewi-Rubinstein, Lodz Chess Club, 1907).
[font color="burgundy"]22.h3[/font] then Black wins after [font color="burgundy"]22...Rxc3 23.Bxc3!! Bxe4 24.Qxg4 Qxg4 25.hxg4 Rd3.[/font]

Also winning is [font color="#D0A020"]19...Ng4 20.Qxg4 Bb6+ 21.Kh1 Rxd3 22.Rad1 Rcxc3.[/font]

If [font color="magenta"]19.Kh1 Bb6[/font] then:

[font color="magenta"]20.Rac1 h5 21.Bb1 Ng4 22.h3 Be3 23.Rc2 Qh4[/font] merely gives White a powerful advantage.
If [font color="darkorange"]20.Rad1[/font] then Black storms through the breach after [font color="darkorange"]20...Bd4 21.Rc1 e5 22.f5 Rc7 23.Bb1 h5.[/font]

[font color="burgundy"]18.Rac1 e5 19.Nd1 Bb8 20.fxe5[/font] continues to give Black a small advantage.

[font color="#D0A020"]16.Ne1 Neg4 17.f4 Rac8 18.Nd1 Nh6 19.Nf3 Bb8[/font] gives Black a small advantage in space.

If [font color="magenta"]13.Bb3 Ne5 14.Nd4 Bb7[/font] then:

[font color="magenta"]15.f3 Rfd8 16.0-0 Ne8 17.Qe2 Ng6 18.Rfd1 Be5[/font] gives Black a slight edge in space.
[font color="darkorange"]15.0-0?! Nfg4! 16.f4 Qh4 17.g3 Qh3[/font] gives Black a stront advantage with pressure on the enemy King's position.

If [font color="magenta"]10.cxd5 exd5 11.Be2[/font] then:

If [font color="magenta"]11...Be6 12.0-0[/font] then:

If [font color="magenta"]12...Qe7 13.Rc1[/font] then:

If [font color="magenta"]13...Rfd8[/font] then:

If [font color="magenta"]14.Na4 Rac8 15.Nc5[/font] then:

[font color="magenta"]15...Ne4 16.Nxe6 fxe6 17.Nd4 Nxd4 18.Bxd4 Rxc1 19.Qxc1[/font] is equal (Ivkov-Tatai, IT, Budva, 1981).
[font color="burgundy"]15...Bxc5 16.Rxc5 Ne4 17.Rc2 f6 18.Qb1 Bg4 19.Rfc1[/font] is equal.

[font color="#D0A020"]14.Qc2 Rac8 15.Qb1 b5 16.Rfd1 h6 17.g3 Bb8[/font] is equal (Rostein-Vladimirov, Op, Helsinki, 1992).

If [font color="darkorange"]13...Rfe8[/font] then:

[font color="darkorange"]14.Na4 a5 15.b5 Na7 16.Nb6 Rad8 17.Qa4[/font] gives White a small advantage ibn space; Black's extra pawn is deadwood (Guimard-Sliwa, ITZ, Goteborg, 1955).
[font color="purple"]14.h3 Rad8 15.Nd4 Ne5 16.Qb3 Bb8 17.Nxe6 fxe6[/font] is equal (Laxman-Short, Op, Ekurhuleni, South Africa, 2011).

If [font color="darkorange"]12...Rc8 13.Rc1[/font] then:

[font color="darkorange"]13...Re8 14.Qd3 Ng4 15.Rfd1 d4 16.exd4 Bf4[/font] gives Black activity in compensation for White's extra pawn, which is the isolated d-pawn (Debray-Laxman, Op, Stiges, 2012).
[font color="purple"]13...Bb8 14.Na4 Qe7 15.Nc5 Ne4 16.Qd3 Nxc5 17.Rxc5[/font] is equal (Potkin-Bacrot, Aeroflot Op, Moscow, 2009).

If [font color="darkorange"]11...Re8 12.0-0[/font] then:

If [font color="darkorange"]12...Bg4 13.Re1 Bc7 14.Rc1 Qd6 15.g3[/font] then:

If [font color="darkorange"]15...Rad8 16.Na4 Ne4[/font] then:

If [font color="darkorange"]17.Nc5!? Nxc5 18.Rxc5 Bb6 19.Rc1[/font] is equal (Aria Santana-Akopian, Ol, Khanty-Mansiysk, 2010).
If [font color="purple"]17.Nd2 Nxd2[/font] then:

[font color="purple"]18.Qxd2 Bxe2 19.Qxe2 Qe7 20.Nc5[/font] gives White a slight initiative.
[font color="hotpink"]18.Bxg4 Nc4 19.Ba1 N6e5 20.Nc5 Qc6 21.Bxe5 Rxe5[/font] is equal.

If [font color="purple"]15...h5 16.Qc2[/font] then:

If [font color="purple"]16...h4?[/font] then after [font color="purple"]17.Nxh4! d4 18.Rcd1 Qe6 19.exd4[/font] White wins (Louis-Anbuhl, Bundesliga 8182, Germany, 1982).
[font color="hotpink"]16...Qe7 17.Ng5 Rad8 18.Bf1 Be5 19.f4 Bxc3 20.Qxc3[/font] gives White a small advantage in space.

If [font color="purple"]12...Bc7[/font] then:

[font color="purple"]13.Rc1 Qd6 14.g3 Bh3 15.Re1 Rad8 16.b5[/font] gives White a slight advantage in space (Beim-Palkovi, Austrian ChT, 2000).
[font color="hotpink"]13.Na4 Ne4 14.Nd4 Qd6 15.f4 Bd7 16.Rc1 Rad8[/font] is equal (Kharlov-Dittmar, Euro ChT, Saint Vincent, Italy, 2000).

If [font color="blue"]5.Bg5[/font]

[font color="blue"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Orthodox Queen's Gambit: Semi-Normal Defense (Pillsbury Opening)[/center][center]Position after 5.Bg5[/center]
[/font]

then:

If [font color="blue"]5...cxd4 6.Nxd4[/font] then:

If [font color="blue"]6...e5[/font] then:

If [font color="blue"]7.Nf3 d4 8.Nd5[/font] then:

If [font color="blue"]8...Nc6[/font] then:

If [font color="blue"]9.e4 Be7 10.Bxf6 Bxf6[/font] then:

[font color="blue"]11.b4 0-0 12.Bd3 a5 13.a3 Be6 14.Rb1 axb4 15.axb4[/font] is equal (Dr. Euwe-Dr. Alekhine, World Ch Match, Holland, 1937)
[font color="#0080C0"]11.h3 0-0 12.Qd2 Be7 13.g4 Be6 14.a3 Bd6[/font] gives Black a slight edge in space (Chistiakov-Bronstein, Soviet Ch ½-final, Moscow, 1945).

[font color="#80C0E0"]9.g3 Be6 10.Bxf6 gxf6 11.Bg2 f5 12.0-0 Bg7[/font] gives Black more space and White better pawns (Swiercz-Lysyj, Euro Ch, Rijeka, 2010).

If [font color="darkblue"]8...Be7[/font] then:

If [font color="darkblue"]9.Bxf6 Bxf6 10.g3[/font] then:

[font color="darkblue"]10...Be6 11.Qb3 Bxd5 12.cxd5 Qa5+ 13.Nd2 Nd7[/font] (K. Georgiev-D. Gurevich, Op, St John, 1988).
[font color="#0080C0"]10...Nc6 11.Nd2 Bg5 12.Bg2 0-0 13.0-0 Kh8 14.Qc2[/font] is equal (Vizantiadis-Fischer, SX, Athens, 1968).

If [font color="dodgerblue"]9.Nxe7 Qxe7[/font] then:

[font color="dodgerblue"]10.e3 Qb4+ 11.Qd2 Qxd2+ 12.Nxd2 Nc6 13.exd4 Nxd4[/font] is equal (Braga-Izeta Txabarri, IT, Toledo, 1991).
[font color="darkcyan"]10.g3 Nc6 11.Bg2 0-0 12.0-0 h6 13.Bxf6 Qxf6[/font] is equal (Szabados-Dr. Euwe, IT, Venedig, 1948).

If [font color="darkblue"]7.Ndb5[/font] then:

If [font color="darkblue"]7...a6 8.Qa4 Bd7 9.cxd5[/font] then:

[font color="darkblue"]9...Qb6 10.Be3 Bxb5 11.Bxb6 Bxa4 12.Nxa4 Bb4+[/font] gives Black a slight edge as Black will no longer be able to castle (Savon-Krogius, Soviet Ch, Tbilisi, 1966).
[font color="0080C0"]9...Bxb5 10.Nxb5 axb5 11.Qxa8 Bb4+ 12.Bd2 Bxd2+ 13.Kxd2[/font] is equal; in compensation for the exchange, Black can win the pawn at d5 and attack White's King in the center (Dr. Vidmar-Foltys, IT, Stuttgart, 1939).

If [font color="dodgerblue"]7...d4!? 8.Bxf6 gxf6 9.Nd5 Na6[/font] then:

If [font color="dodgerblue"]10.Qa4 Bd7 11.0-0-0 Rc8[/font] then:

If [font color="dodgerblue"]12.Kb1?[/font] then after [font color="dodgerblue"]12...Nc5 13.Qb4 a5 14.Qa3 Bxb5 15.Qf3 Bxc4[/font] Black has a winning position with an extra pawn and more activity (Chajes-Teichmann, IT, Karlsbad, 1911).
[font color="slateblue"]12.e3 Nc5 13.Qxa7 Bxb5 14.exd4 exd4 15.Re1+ Ne6[/font] gives Black more activity and horrible pawns.
[font color="darkcyan"]10.e4 Bd7 11.Bd3 Bxb5 12.cxb5 Nb4 13.Qf3 Nxd5 14.exd5[/font] gives White a small advantage in space (Kluger-Hajtun, Hungarian Ch, Budapest, 1954).

If [font color="darkblue"]6...Be7 7.cxd5[/font] then:

If [font color="darkblue"]7...exd5[/font] then:

If [font color="darkblue"]8.e3 0-0[/font] then:

If [font color="darkblue"]9.Be2 Nc6 10.0-0[/font] then:

If [font color="darkblue"]10...Be6 11.Rc1 Rc8[/font] then:

If [font color="darkblue"]12.a3[/font] then:

[font color="darkblue"]12...Nxd4 13.Qxd4 Qa5 14.Rfd1 h6 15.Bf4[/font] gives White a small advantage in space (Hort-Wockenfuss, Bundesliga 8485, Germany, 1985).
[font color="#0080C0"]12...Na5 13.f4 Nc4 14.f5 Bd7 15.Bxc4 dxc4 16.Qf3[/font] is equal (J. Horvath-Nyback, IT, Helsinki, 2001).

If [font color="dodgerblue"]12.Na4 Ne4 13.Bxe7 Qxe7[/font] then:

[font color="dodgerblue"]14.Nxc6 bxc6 15.Bd3 f5 16.f3 Nd6 17.Re1 Rf6[/font] gives White a small advantage in space (Johannessen-Miezis, Rilton Cup 0607, Stockholm, 2006).

[font color="darkcyan"]14.f3 Nd6 15.Bd3 Nxd4 16.exd4 Qf6 17.Rxc8 Rxc8[/font] gives Black a slight edge with her centralized pieces (Janjghava-Pokorna, Euro ChW, Istanbul, 2003).

If [font color="dodgerblue"]8.g3 Nc6 9.Bg2 0-0 10.0-0 h6[/font] then:

If [font color="dodgerblue"]11.Be3 Re8 12.Rc1[/font] then:

If [font color="dodgerblue"]12...Bf8 13.Nxc6 bxc6[/font] then:

If [font color="dodgerblue"]14.Na4[/font] then:

If [font color="dodgerblue"]14...Bd7 15.Bc5 Bxc5 16.Nxc5[/font] then:

If [font color="dodgerblue"]16...Bg4 17.Re1 Qa5[/font] then:

If [font color="dodgerblue"]18.h3 Bf5[/font] then:

[font color="dodgerblue"]19.Qa4 Qd2 20.Qf4 Qxf4 21.gxf4 Rab8 22.b3[/font] draw (Kramnik-Illescas Córdoba, IT, Pamplona, 1993).[/font]
[font color="#0080C0"]19.a3 Rab8 20.Na4 Qb5 21.b4 Re7 22.e3[/font] is equal (M. Bensdorp-Middelwald, Dutch ChW, Hilversum, 2008).

[font color="#20C0E0"]18.Qc2 Rab8 19.b3 Bh5 20.Qb2 Bg6 21.Red1 Rb5[/font] gives White a slight advantage with stronger pawns (Stangl-Balashov, Op, Munster, 1993).

If [font color="darkcyan"]16...Bf5 17.e3 Rb8[/font] then:

[font color="darkcyan"]18.Qd2 Qb6 19.b3 Ne4 20.Qd4 Qa5 21.Qa4[/font] gives White a small advantage in space (Browne-Leski, IT, San Francisco, 1987).
If [font color="slateblue"]18.Qd4 a5 19.b3 Qc8 20.Qa4[/font] then:

[font color="slateblue"]20...Bh3?! 21.Qxa5 Qf5 22.Qd2 h5 23.f3 Bxg2 24.Kxg2[/font] gives White an extra pawn (Ilincic-Somborski, 1st Saturday February, Budapest, 2007).
[font color="steelblue"]20...Rb5 21.Rfd1 Bh3 22.Bf3 Qf5 23.Qf4 Nd7 24.Nd3[/font] continues to give White a small advantage owing to stonger pawns; White is targeting Black's backward pawn at c6.

If [font color="darkcyan"]14...Qa5[/font] then:

If [font color="darkcyan"]15.Rxc6 Bd7 16.Bd2[/font] then:

If [font color="darkcyan"]16...Bb4 17.Rc5 Qxa4 18.Qxa4 Bxa4 19.Bxb4 Rxe2 20.Ra5 Bc6[/font] then:

[font color="darkcyan"]21.Bc3 Ne4 22.Bf3 Rc2 23.Bd1 Rc1 24.Bd4 Rc4[/font] is equal (Sundararajan-K. Goh, Asian Ch, Subic Bay, 2010).
[font color="#20C0E0"]21.b3 Rc2 22.Rc5 Rxc5 23.Bxc5 Ne4 24.Rc1 Bb5[/font] gives White better pawns; Black has a weak passer (Greenfeld-Illescas Córdoba, Ol, Thessaloniki, 1988).

[font color="steelblue"]16...Qb5 17.Rxf6 gxf6 18.Nc3 Qxb2 19.Nxd5 Bg7 20.Bc3[/font] gives White stronger pawns (Zapletal-J. Nielsen, Corres, 1972).

[font color="slateblue"]15.a3!? Qb5! 16.Re1 Bf5 17.Bd4[/font] draw (Koshy-Gokhale, Indian Ch, Nagpur, 2002).

If [font color="darkcyan"]14.Bd4 Bg4[/font] then:

If [font color="darkcyan"]15.Qa4 Bd7 16.Bxf6 Qxf6[/font] then:

[font color="darkcyan"]17.Bxd5!? cxd5! 18.Qxd7 Rad8 19.Qa4 d4[/font is equal (Stein-Damjanovic, IT, Vrnjacka Banja, 1971).
[font color="steelblue"]17.Nxd5 cxd5 18.Qxd7 Rad8 19.Qb5 a6 20.Qd3[/font] gives White a small advantage in space.

[font color="slateblue"]15.Re1 Qd6 16.Qa4 Bh5 17.Qa6 Nd7 18.Na4 Qb4[/font] is equal (D. Cori Tello-Bezgodova, World Youth GU18, Halkidiki, 2010).

If [font color="darkcyan"]12...Bg4 13.h3 Be6 14.Nxe6 fxe6 15.f4 Qd7 16.Bf2[/font] then:

If [font color="darkcyan"]16...Bb4 17.Qa4 a6 18.Rfd1 b5 19.Qc2 Rac8 20.Qb1[/font] is equal (Spassky-Xu Jun, Ol, Dubai, 1986).
If [font color="slateblue"]16...Rad8!? 17.Qa4!?[/font] then:

If [font color="slateblue"]17...Bd6! 18.Rfd1 Qf7 19.e4 d4 20.Nb5[/font] gives White a small advantage in space (Ilincic-Manca, 1st Saturday June, Budapest, 2005).

If [font color="darkcyan"]11.Bf4 Bg4 12.h3 Be6 13.Rc1[/font] then:

If [font color="darkcyan"]13...Rc8 14.Nxe6 fxe6 15.e4 d4 16.Ne2 e5[/font] remains equal (Tukmakov-Giorgadze, Soviet Ch 1st League, Simferopol, 1988).
If [font color="slateblue"]13...Qd7!? 14.Nxe6 fxe6 15.e4[/font] then:

If [font color="slateblue"]15...d4[/font] (the pawn outruns its protectors and becomes weak) [font color="slateblue"]16.e5[/font then:

16...dxc3 17.exf6 Qxd1 18.Rfxd1 Bxf6 19.bxc3 Rad8

[font color="slateblue"]20.Be3 Rxd1+ 21.Rxd1 Bxc3 22.Bxc6 bxc6 23.Rc1[/font] wins a pawn for White (Cmilyte-Rohonyan, Euro ChW, Chisinau, Moldova, 2005).
If [font color="steelblue"]20.Re1[/font] then:

[font color="steelblue"]20...Kf7 21.Be3 Ne5 22.Rc2 Nd3 23.Rb1 b6[/font] is equal (Sasikiran-Akobian, World Jr Ch, Yerevan, 2000).
[font color="#2048D0"]20...Rfe8 21.Be4 Kf7 22.Rc2 Rd7 23.Kg2 Rc8[/font] is equal (Jobava-Frois, Anibal Op, Linares, 2001).

If [font color="steelblue"]16...Ne8!?[/font] then:

[font color="steelblue"]17.Qd3!? Nb4 18.Qg6 dxc3 19.Be4 Rxf4 20.gxf4 cxb2[/font] is equal (Tsinganova-Malysheva, Euro ChW, Chisinau, 2005).
If [font color="#2048D0"]17.Ne2![/font] then [font color="#2048D0"]17...d3 18.Bxc6 bxc6 19.Rc3 Rd8 20.Nc1[/font] makes toast of Black's d-pawn.

The alternative to 15...d4 is [font color="#0080C0"]15...Rad8[/font] when still the d-pawn becomes weak after [font color="#0080C0"]16.exd5 exd5 17.a3 d4 18.Qb3+ Kh8 19.Rcd1.[/font]

If [font color="darkblue"]5...dxc4[/font] then:

If [font color="darkblue"]6.e3 a6 7.a4[/font] then:

If [font color="darkblue"]7...cxd4 8.exd4 Bb4 9.Bxc4[/font] then:

[font color="darkblue"]9...Qc7 10.Qe2 Ne4 11.0-0 Nxg5 12.Nxg5 Qe7 13.Qh5 [/font] gives White the advantage in space and a lead in development; Black has stronger pawns (Janowski-Capablanca, IT, New York, 1918 and Biedermann-Galinkski, IT, Krakow, 1938).
[font color="slateblue"]9...Nc6 10.0-0 0-0 11.Rc1 Be7 12.Re1 h6 13.Bf4 [/font] gives White better Bishops and Black better pawns (Kasparov-Nogueiras, IT, Belfort, 1988).

[font color="darkcyan"]8.Bxc4 cxd4 9.exd4 Be7 10.0-0 0-0 11.Re1 [/font] is equal (Mamedyarov-Gyimisi, Euro ChT, Gotegorg, 2005).

[font color="dodgerblue"]6.e4 cxd4 7.Nxd4 Bc5 8.Qa4+ Nbd7 9.0-0-0 Qb6[/font] is equal (A. Becker-K. Havasi, Ol, Prague, 1931).

5...Nxd5

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Orthodox Queen's Gambit: Semi-Normal Defense (Exchange Opening)[/center][center]Position after 5...Nf6d5:p[/center]

6.e3

White may also play for central control with 6.e4.
[font color="red"](San Sebastian Opening)[/font] If [font color="red"]6.e4[/font]

[font color="red"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Orthodox Queen's Gambit: Semi-Normal Defense (San Sebastian Opening)[/center][center]Position after 6.e4[/center]
[/font]

[font color="red"]6...Nxc3 7.bxc3 cxd4 8.cxd4[/font] then:

If [font color="red"]8...Bb4+ 9.Bd2[/font] then:

If [font color="red"]9...Bxd2+ 10.Qxd2 0-0 11.Bc4[/font] then:

If [font color="red"]11...Nc6 12.0-0[/font] then:

If [font color="red"]12...b6 13.Rad1 Bb7[/font] then:

If [font color="red"]14.Rfe1 14...Rc8 15.d5[/font] then:

If [font color="red"]15...Na5 16.Bd3[/font] then:

If [font color="red"]16...exd5 17.e5 Nc4 18.Qf4[/font] then:

If [font color="red"]18...Nb2 19.Bxh7+ Kxh7 20.Ng5+ Kg6 21.h4[/font] then:

[font color="red"]21...Rc4 22.h5+ Kh6 23.Nxf7+ Kh7 24.Qf5+ Kg8 25.e6[/font] gives White a small advantage with power up the middle (Polugaevsky-Tal, Soviet Ch, Moscow, 1969).
[font color="burgundy"]21...Qe7 22.Rd2 Rc4 23.Qg3 Kh6 24.Rxb2 f6 25.Nf3[/font] gives White excellent winning chances (Dreev-Jussupow, Rpd Op, Mainz, 2003).

[font color="#D0A020"]18...h6 19.e6 Qf6 20.Qxf6 gxf6 21.Bf5 Rc7 22.Nd4[/font] gives White a small advantage; Black would lose the exchange if he captures on e6 (Huzman-Parligras, Ol, Torino, 2006).

If [font color="darkred"]16...Qe7 17.Qf4 Rfd8[/font] then:

[font color="darkred"]18.Bf1 exd5 19.e5 Rc3 20.Bd3 Bc8 21.Re3 Rc6[/font] is equal (Papin-Rakhmanov, Russian ChU20, St Petersburg, 2008).
[font color="magenta"]18.h4 h6 19.Nd4[/font] draw (Kamarov-Golod, Euro Club Cup, Saint Vincent, 2005).

If [font color="darkred"]15...exd5 16.Bxd5[/font] then:

If [font color="darkred"]16...Qc7 17.Qg5 h6[/font] then:

[font color="darkred"]18.Qg4 Rfd8 19.Qf5 Nb4 20.Bb3 Nd3 21.Re3 Nc1[/font] gives Black a small tactical advantage (Hort-Unzicker, IT, Palma de Mallorca, 1969).
[font color="darkorange"]18.Qh5 Rfd8 19.Rc1 Qf4 20.g3 Qf6 21.Kg2[/font] is equal (Cumbers-N. Gill, British Ch, Torquay, 2009).

[font color="magenta"]16...Qe7 17.Qf4 Nd8 18.h4 Ne6 19.Qg4 Nc5 20.h5[/font] promises a sharp middle game with White playing on the kingside and Black having chances on the opposite wing (Mecking-Leitão, Brazilian Inet Blitz Ch, Cyberspace, 2008).

If [font color="darkred"]14.Qf4[/font] then:

If [font color="darkred"]14...Qf6 15.Qe3 Rac8[/font] then:

[font color="darkred"]16.Rfe1 Rfd8 17.d5 Na5 18.Bd3 e5 19.Rc1[/font] gives White a protected passed pawn and Black a remote pawn majority(Szapiel-Averbakh, IT, Szczawno Zdroj, 1950)./i]
[font color="darkorange"]16.e5 Qh6 17.Qxh6 gxh6 18.Rfe1 Nb4 19.Bb3 Rfd8[/font] gives Black an active Knight, command of the c-file and pressure on White's backward pawn; White's backward d-pawn is sufficiently covered for the moment (Gschnitzer-Ribli, Bundesliga 0506, Germany, 2005).
[font color="purple"]16.Rc1 Rfd8 17.Rfd1 Qe7 18.a3 h6 19.d5 Nb8[/font] remains equal.

[font color="magenta"]14...Na5 15.Bd3 Qf6 16.Qg3 h6 17.Rfe1 Rfe8 18.h4[/font] remains equal (Werle-de Jong, Op, Hooveveen, 2006).

If [font color="darkred"]12...Qd6[/font] then:

[font color="darkred"]13.Rac1 Bd7 14.e5 Qe7 15.Ng5 b6 16.Rc3[/font] gives White a small advantage with a better center and an active Rook(Timoshenko-Andrijevic, Op, Agios Nikolaos, 1997).
If [font color="magenta"]13.Rfd1!? Rd8![/font] (the game is equal) [font color="magenta"]14.Rac1 Bd7[/font] then:

If [font color="magenta"]15.e5 Qe7 16.Qf4[/font] then:

[font color="magenta"]16...Be8 17.h4 Rac8 18.d5 exd5 19.Rxd5 h6 20.Rcd1 Rxd5 21.Rxd5 Rd8 22.Qe4[/font] draw (Petrosian-Korchnoi, Candidates' Match, Il Ciocco, Italy, 1977).
[font color="purple"]16...Nb4 17.a3 Nd5 18.Bxd5 exd5 19.Rc7 b6[/font] draw (Ribli-Kuligowski, Ol, Buenos Aires, 1978).

[font color="darkorange"]15.Qe2 Rac8 16.d5 exd5 17.Bxd5 Be6 18.Bxc6 Rxc6 19.Rb1 Rb6[/font] draw (Portisch-Polugaevsky, IZT, Portoroz, 1973).

If [font color="darkred"]11...Nd7 12.0-0 b6 13.Rfe1 Bb7[/font] then:

If [font color="darkred"]14.Rad1 Rc8[/font] then:

If [font color="darkred"]15.Bb3 Qf6 16.Qe3 Rfd8 17.h3[/font] then:

If [font color="darkred"]17...h6 18.Nh2 Qe7 19.Nf1 b5[/font] then:

[font color="darkred"]20.d5 Nc5 21.dxe6 fxe6 22.Ng3 Rxd1 23.Rxd1 Kh8[/font] is equal and soon agreed drawn (Illescas Córdoba-Ivanchuk, Ol, Bled, 2002).
[font color="burgundy"]20.Ng3 a5 21.d5 exd5 22.Nf5 Qf6 23.Bxd5[/font] gives White the advantage in space; Black has a remote pawn majority that will be a great benefit if he survives to the endgame (Tregubov-Wippermann, Op, Gibraltar, 2003).

[font color="#D0A020"]17...Nf8 18.d5 exd5 19.exd5 Ng6 20.Ng5[/font] leaves White with more activity and a central pawn that is isolated but well protected and passed (Jakovenko-Naiditsch, Rpd, Odessa, 2009).

If [font color="magenta"]15.Bd3[/font] then:

If [font color="magenta"]15...Re8 16.h4[/font] then:

[font color="magenta"]16...h6 17.Bb5 Re7 18.Bxd7 Rxd7 19.Ne5 Rdc7[/font] gives Black command of the c-file and White a better center (Mamedyarov-Marcelin, Eurp Ch, Istanbul, 2003).
If [font color="darkorange"]16...Nf8[/font] then:

[font color="darkorange"]17.h5!? 17...h6! 18.a4 Nh7 19.Qf4 Rc3 20.Bb5 Rf8[/font] gives Black an active Rook (Mamedyarov-B. Socko, Ol, Istanbul, 2012).
[font color="purple"]17.a4 Re7 18.Ra1 a6 19.Rab1 Rc6[/font] remains requal.

If [font color="darkorange"]15...h6[/font] then:

[font color="darkorange"]16.h3 Qc7 17.Bb1 Rfd8 18.d5 exd5 19.exd5[/font] gives Black better pawns and command of the c-file; White balances that with an advanced passer (Brunello-Van der Werf, IT C, Wijk aan Zee, 2013).
[font color="purple"]16.Bb1 Re8 17.Re3 Qc7 18.e5 Nf8 19.Ne1 Qe7[/font] is equal (Radjabov-Van Wely, World Cup, Khanty-Mansiysk, 2005).

If [font color="magenta"]14.a4 Rc8 15.Bd3[/font] then:

If [font color="magenta"]15...e5 16.d5 Nc5[/font] then:

If [font color="magenta"]17.Bc4 Qd6 18.Qb2 f5[/font] then:

[font color="magenta"]19.exf5 e4 20.Qe5 Rcd8 21.Qxd6 Rxd6 22.Ng5[/font] gives White more activity (Pashikian-A. Mastrovasilis, Euro Ch, Aix-les-Bains, 2011).
[font color="hotpink"]19.Qxe5 Nxe4 20.Rxe4 Qxe5 21.Rxe5 Rxc4 22.Rd1 Rfc8[/font] is equal (Zude-Fridman, Op, Bad Wiessee, 2012).

[font color="purple"]17.Ra3 Qd6 18.Qb2 f5 19.Nxe5 fxe4 20.Bb1 Rce8[/font] gives Black a slight initiative (Agdestein-C. Hansen, PCA Qual, Groningen, 1993).

[font color="darkorange"]15...a5 16.h3 h6 17.Rab1 Qe7 18.Bb5 Nf6 19.Bd3[/font] is equal (Barmidze-Bacrot, Bundesliga 1213, Baden-Baden, 2013).

If [font color="darkred"]9...Qa5 10.Rb1 Bxd2+[/font] then:

If [font color="darkred"]11.Qxd2 Qxd2+ 12.Kxd2 0-0[/font] then:

If [font color="darkred"]13.Bd3[/font] then:

[font color="darkred"]13...b6 14.e5 Bb7 15.Ng5 h6 16.Ne4 Bd5[/font] is equal (Hrzic-Pokrajac, TT, Belgrade, 2010).
If [font color="magenta"]13.Bb5 a6 14.Bd3[/font] then:

[font color="magenta"]14...b5 15.Rhc1 Nd7 16.Rc7 Nb6 17.Rbc1 f6 18.Ke3[/font] gives White the advantage with a full pawn center and an active Rook (Stohl-Plachetka, Czechoslovakian Ch, Prague, 1986).
[font color="darkorange"]14...Rd8 15.Rhc1 b5 16.Rc7 Nd7 17.Ke3 Nf6 18.Ne5[/font] gives White the advantage in space (Rubinstein-Schlechter, IT, San Sebastian, 1912).

[font color="#D0A020"]13...Rd8 14.Rhc1 Nc6 15.Ke3 f6 16.h4 Na5 17.g4[/font] gives White a small advantage in space (Antonshin-Korchnoi, Soviet Ch, Moscow, 1951).

[font color="darkorchid"]11.Nxd2!? 0-0 12.Bc4 Nc6 13.d5 exd5 14.Bxd5 Ne7[/font] leaves Black with a slight initiative and, although it is a little late to still mention it, a lead in development (Dr. Bernstein-Schlechter, IT, Stockholm, 1906).

If [font color="darkred"]8...Nc6 9.Bc4 b5[/font] then:

If [font color="darkred"]10.Be2 Bb4+ 11.Bd2 Qa5[/font] then:

If [font color="darkred"]12.d5 exd5 13.exd5 Ne7 14.0-0 Bxd2 15.Nxd2 0-0[/font] then:

[font color="darkred"]16.Bf3 Nf5 17.a4 Bd7 18.axb5 Qxb5 19.Ne4[/font] gives each side a passed pawn: White's is more advanced and Black's is more remote (Polugaevsky-Ribli, IT, London, 1984).
If [font color="magenta"]16.Nb3 Qd8[/font] then:

If [font color="magenta"]17.Bf3 Nf5[/font] then:

[font color="magenta"]18.Rc1 Nd6 19.Qd4 Qb6 20.Qf4 Bd7 21.Nd4[/font] give White a small advantage in space (Jussupow-Ribli, Candidates' Trmt, Montpellier, France, 1985).
[font color="purple"]18.Qd3 Nd6 19.Nd4 Bd7 20.a4[/font] gives White a small advantage in space ( Gheorghiu-Farago, IT, Novi Sad, 1979 and Adorjan-Farago, Hungarian ChT, 1993).

[font color="darkorange"]17.Bxb5 Bb7 18.Nc5 Qb6 19.Nxb7 Qxb5 20.Rb1 Qxd5[/font] is equal (K. Georgiev-Ribli, IT, Sarajevo, 1985).

If [font color="magenta"]12.Rb1 Bxd2+ 13.Qxd2 a6[/font] then:

If [font color="magenta"]14.Qxa5 Nxa5 15.Kd2[/font] then:

[font color="magenta"]15...Bb7 16.Ke3 Ke7 17.Rhc1 Rhc8 18.Nd2 Rxc1 19.Rxc1[/font] is equal (Dorfman-Murey, French ChT, 1992).
[font color="purple"]15...Ke7 16.Rhc1 Bd7 17.Ke3 Rhc8 18.Ne5 Be8 19.f4[/font] is equal (Gligoric-Ribli, IT, Portoroz, 1985).

[font color="darkorange"]14.Rb2 Ke7 15.0-0 Qxd2 16.Rxd2 Rd8[/font] is equal (Kavalek-Hort, IT, Montreal, 1979).

If [font color="magenta"]10.Bd3 Bb4+[/font] then:

If [font color="magenta"]11.Bd2 Bxd2+ 12.Qxd2 a6[/font] then:

[font color="magenta"]13.0-0 0-0 14.d5 Ne7 15.a4 bxa4 16.Rxa4 exd5[/font] gives White more activity (Svetushkin-Kourkounakis, IT, Greek ChT, Ermioni, 2006).
[font color="purple"]13.a4 0-0 14.Qc3 Bb7 15.axb5 axb5 16.0-0 Qb6[/font] is equal (Spassky-Fischer, World Ch Match, Reykjavik, 1972).

[font color="darkorange"]11.Kf1 0-0 12.e5 Qd5 13.Rb1 Be7 14.h4 Ba6[/font] is equal (Shabalov-D. Gurevich, US Ch, San Diego, 2004).

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Orthodox Queen's Gambit: Semi-Normal Defense (Exchange Opening/Main Line)[/center][center]Position after 6.e3[/center]

6...Nc6 7.Bd3

If [font color="red"]7.Bc4[/font] then:

If [font color="red"]7...Nxc3 8.bxc3[/font] then:

If [font color="red"]8...Be7 9.0-0 0-0[/font] then:

If [font color="red"]10.e4 b6[/font] then:

[font color="red"]11.Bb2 Bb7 12.Qe2 Na5 13.Bd3 Rc8 14.Rad1[/font] is equal (Keres-Geller, Moscow, 1962)
[font color="burgundy"]a) 11.Be2 Na5 12.Qd2 Bb7 13.Qf4 cxd4 14.cxd4[/font] gives White a slight edge in space (Lein-Averbakh, Soviet Ch, Alma Ata, 1968).
[font color="#D0A020"]b) 11.Be3 cxd4 12.cxd4 Bb7 13.Rc1 Rc8 14.Qe2 Na5[/font] is equal (Taimanov-Geller, IT, Dresden, 1959).

If [font color="darkred"]10.Qe2[/font] then:

If [font color="darkred"]10...b6 11.Rd1 cxd4[/font] then:

If [font color="darkred"]12.exd4 Na5 13.Bd3 Bb7 14.Bf4 Qd5 15.Rab1[/font] then:

If [font color="darkred"]15...Rac8 16.Rb5[/font] then:

If [font color="darkred"]16...Qd8?[/font] then after [font color="darkred"]17.Ng5! Bxg5 18.Bxg5 Qd6 19.Bf6 Qf4 20.Be5[/font] White wins (Pachman-Neikirch, ITZ, Potoroz, 1958).
[font color="burgundy"]16...Qd7 17.Ne5 Qe8 18.c4 Ba6 19.Rbb1[/font] gives White a small advantage in space.

[font color="#D0A020"]15...Bc6!? 16.Be5 Ba4 17.c4 Qd7 18.Rd2 Nc6 19.d5[/font] gives White a small advantage in space (Stahlberg-Szabo, Ol, Helsinki, 1952).

[font color="darkpink"]12.cxd4 Na5 13.Bd3 Bb7 14.e4 Rc8 15.Rb1 Bf6[/font] is equal (Khenkin-Jussupow, German Ch, Altenkirchen, 2005).

If [font color="magenta"]10...Qc7 11.e4[/font] then:

[font color="magenta"]11...b6 12.Rd1 Bb7 13.Bg5 h6 14.Be3 Na5 15.Bd3[/font] is equal (Pachman-Kholmov, IT, Bucharest, 1954).
[font color="darkorange"]11...cxd4 12.cxd4 e5 13.d5 Na5 14.Bd3 b6 15.Bb2[/font] gives White a small advantage in space (Folke Ekstrom-Szabo, Op, Zaandam, 1946).

If [font color="darkred"]8...cxd4 9.exd4 Be7 10.0-0 0-0[/font] then:

If [font color="darkred"]11.Re1 b6 12.Bd3 Bb7[/font] then:

If [font color="darkred"]13.h4[/font] then:

If [font color="darkred"]13...Bxh4 14.Nxh4 Qxh4 15.Re3 g6 16.Rg3[/font] then:

If [font color="darkred"]16...Qf6 17.Qg4[/font] then:

[font color="darkred"]17...Qg7 18.Qh4 f5 19.Bh6 Qf6 20.Bg5 Qf7[/font] is equal (Anand-G. Morrison, British Ch, Blackpool, 1988).
If [font color="magenta"]17...e5 18.Bg5[/font] then:

[font color="magenta"]18...Qg7?! 19.Qh4! f5 20.Bc4+ Kh8 21.Bh6[/font] gives White the Bishop pair and a promising kingside attack for a sacrificed pawn (Skytte-Malakhatko, Op, Cappelle-la-Grande, 2003).
[font color="darkorange"]18...Qe6 19.Bf5 Qd6 20.Qh4 Nxd4 21.cxd4 Qxd4 22.Qxd4[/font] gives White a comfortable game with more activity; Black has three pawns for a Bishop.

[font color="burgundy"]16...Qe7 17.Bg5 f6 18.Bh6 Rf7 19.Qh5 f5 20.Re1[/font] is equal (Korneev-Malakhov, Op, Porto San Grigorio, 1997 and Izoria-Golod, Euro Ch, Ohrid, 2001)

If [font color="magenta"]13...Bf6 14.Ng5 g6 15.Qg4[/font] then:

If [font color="magenta"]15...h5 16.Qg3 Ne7 17.Ba3 Qd7 18.Rad1 Rfe8 19.d5[/font] gives White a small advantage in a complicated position (Solomunovic-Zelic, Bosnian ChT, Neum, 2005).
If [font color="darkorange"]15...Ne7!? 16.h5[/font] then:

[font color="darkorange"]16...Nf5? 17.hxg6 hxg6 18.Rxe6 fxe6 19.Nxe6[/font] gives White a winning position (D. Boros-Zierk, IT, St Louis, 2012)
[font color="purple"]16...Rc8 17.Qh3 Bxg2 18.Qxg2 Rxc3 19.Rd1 Bxg5 20.Qxg5[/font] gives White a small advantage in space.

If [font color="magenta"]13.Qc2 g6 14.Bh6 Re8 15.Qd2 Rc8[/font] then:

If [font color="magenta"]16.Rac1 Qc7 17.h4[/font] then:

If [font color="magenta"]17...Na5 18.Ng5[/font] then:

[font color="magenta"]18...Nc4!? 19.Bxc4 Qxc4 20.Qf4 Bxg5 21.Bxg5[/font] gives White a slight edge with a threat to mate in three (Portisch-O'Kelly, IT, Malaga, Spain, 1964).
[font color="burgundy"]18...Ba3 19.Rc2 Bd6 20.h5 Bh2+ 21.Kh1 Bf4[/font] remains equal.

If [font color="darkorange"]17...Bf6!? 18.h5![/font] (White has a small advantage in space) [font color="darkorange"]18...e5 19.d5 Ne7 20.c4![/font] then:

[font color="darkorange"]20...Rcd8? 21.Ng5! Nf5 22.Ne4 Be7 23.Bg5 Kg7 24.h6+ Kh8 25.Nf6 Rf8 26.Bxf5 gxf5 27.Qc3[/font] Black resigns (Najdorf-Sliwa, Alekhine Mem, Moscow, 1956).
[font color="purple"]20...Qd6 21.Ng5 Bxg5 22.Qxg5 f6 23.Qh4[/font] continues to give White a small advantage.

If [font color="darkorange"]16.h4 Na5 17.Ng5 Bf8 18.Bxf8 Rxf8 19.h5 Nc4[/font] then:

[font color="darkorange"]20.Qf4 h6 21.Ne4 g5 22.Qc1 Kg7 23.f4 g4[/font] is equal (Langeweg-Farago, IT, Amsterdam, 1976).
[font color="purple"]20.Bxc4 Rxc4 21.hxg6 hxg6 22.Qf4 Qd5 23.f3 Kg7[/font] is equal (Najdorf-Tal, TM, Belgrade, 1970).

If [font color="magenta"]11.Qe2 b6 12.Re1[/font] then:

If [font color="magenta"]12...Bb7 13.Bd3 Na5[/font] then:

[font color="magenta"]14.Ne5 Rc8 15.Bb2 Bd6 16.Qh5 f5 17.Nf3 Qe8[/font] is equal (Larsen-Ribli, ITZ, Las Palmas, 1982).
[font color="purple"]14.Bb2 Bf6 15.Rad1 Rc8 16.Ba3 Be7 17.Bb2[/font] draw(Burger-Marchand, Op, New York, 1990).

[font color="darkorange"]12...Bf6 13.Qe4 Bb7 14.Bd3 g6 15.Bh6 Re8 16.Qg4[/font] is equal (Lahno-Maiko, Ukrainian TTU18, Evpatoria, 2001).

If [font color="darkred"]7...cxd4 8.exd4 Be7 9.0-0 0-0 10.Re1[/font] then:

If [font color="darkred"]10...b6 11.Nxd5 exd5 12.Bb5[/font] then:

If [font color="darkred"]12...Bd7 13.Qa4[/font] then:

[font color="darkred"]13...Nb8 14.Bf4 Bxb5 15.Qxb5 a6 16.Qa4[/font] gives White a small advantage in space (Botvinnik-Dr. Alekhine, AVRO Trmt, Holland, 1938).
[font color="burgundy"]13...Rc8 14.Bf4 Bf6 15.Rac1 Re8 16.Rxe8+ Qxe8 17.Re1[/font] gives White a small advantage in space and command of the e-file (S. B. Hansen-Palo, Danish Ch, Horsens, 2003).

If [font color="magenta"]12...Bb7[/font] then:

If [font color="magenta"]13.Qa4[/font] then:

If [font color="magenta"]13...Ra8 14.Bf4 a6[/font] then:

[font color="magenta"]15.Bxc6 Rxc6 16.Ne5 Rc8 17.Qd7 Ba8 18.Rac1[/font] gives White more activity and space (Neikirch-Sliwa, ZT, Sofia, 1957).
[font color="#D0A020"]15.Bd3 b5 16.Qd1 g6 17.h4 Re8 18.Bf1 Qb6[/font] is equal (Timofeev-Leong, World Jr Ch, Goa, 2002)./li]

[font color="purple"]13...Na5 14.Bd2 Nc4 15.Bxc4 dxc4 16.Qxc4 Bxf3 17.gxf3[/font] is equal (Cafferty-Botterill, IT, Birmingham, 1977).

[font color="darkorange"]13.Bf4 Bd6 14.Ne5 Ne7 15.Bd3 Bc8 16.Qh5[/font] gives White a clear advantage in space and the initiative on the kingside (Korneev-Burmakin, Op, Nova Gorica, 2002).

If [font color="magenta"]10...Nf6[/font] then:

If [font color="magenta"]11.a3 a6[/font] then:

If [font color="magenta"]12.Bb3[/font] then:

If [font color="magenta"]12...b5 13.d5 exd5 14.Nxd5 Nxd5[/font] then:

If [font color="magenta"]15.Bxd5 Bb7 16.Bf4 Bf6 17.Rc1 Rc8[/font] then:

If [font color="magenta"]18.b4 Ba8[/font] then:

If [font color="magenta"]19.h3 Nd4 20.Bxa8 Rxa8[/font] then:

If [font color="magenta"]21.Nxd4 Qxd4[/font] then:

If [font color="magenta"]22.Qxd4 Bxd4 23.Be5 Bxe5 24.Rxe5 Rfc8[/font] is equal (Eljanov-Sadvakasov, Rector Cup, Kharkov, 2003).
[font color="burgundy"]22.Qf3 Rfd8 23.Red1 Qa7 24.Rc7 Rxd1+ 25.Qxd1 Qd4[/font] continues to give White a small advantage in space.

If [font color="darkorange"]21.Bc7 Nxf3+ 22.Qxf3 Qd4[/font] then:

[font color="darkorange"]23.Red1!? Qb2 24.Qd3[/font] gives White a slight advantage with more active Rooks (Harikrishna-Ganguly, British Ch, Torquay, 2002).
[font color="purple"]23.Bf4 Qb6 24.Be3 Bd4 25.Rc6[/font] gives White a small advantage in space.

[font color="#D0A020"]19.Qb3 Nd4 20.Rxc8 Nxf3+ 21.Qxf3 Qxc8 22.g3[/font] is equal (Wang Hao-Karjakin, Mind Games Rpd, Beijing, 2012).

If [font color="darkorange"]18.Bd6 Re8[/font] then:

[font color="darkorange"]19.Bxf7+!! Kxf7 20.Qd5+ Kg6 21.Rxe8 Qxe8 22.Qd3+ Kf7[/font] is equal (Ljubojevic-Smyslov, ITZ, Petropolis, Brazil, 1973).
If [font color="purple"]19.Qd2 Qd7[/font] then:

If [font color="purple"]20.Red1!? Red8![/font] then:

If [font color="purple"]21.Be4?! Qe6! 22.Qf4 Nd4[/font] then:

[font color="purple"]23.Rxc8 Ne2+ 24.Kf1 Rxc8 25.Kxe2 Bxe4 26.Kf1 Bxb2[/font] wins a pawn; Black has better piece coordination (Lilienthal-Boleslavsky, Soviet Trmt, Kuibyshev, 1942).
If [font color="#D0A020"]23.Nxd4 Rxc1 24.Qxc1 Qxe4 25.Nf3 h6 26.Bb4 Rxd1+ 27.Qxd1 Bxb2[/font] also gives Black an extra pawn.

If [font color="burgundy"]21.b3 h6 22.Qe1 Qxd6 23.Bxc6 Rxc6 24.Rxd6 Rcxd6[/font] leaves Black with command of the d-file in compensation for the material deficeit.

[font color="hotpink"]20.Rxe8+ Rxe8 21.Bf4 Rd8 22.Bxc6 Bxc6 23.Qxd7 Bxd7[/font] remains equal.

If [font color="darkorange"]15.Qxd5 Bb7[/font] then:

If [font color="darkorange"]16.Qf5 Bf6 17.Bg5 Nd4[/font] then:

[font color="darkorange"]18.Nxd4 Bxg5 19.Rad1 g6 20.Qg4 Qf6 21.Qd7 Rab8[/font] is slightly better for Black (Silva-Turkov, Corres, 1999)
[font color="E0C020"]18.Bxf6 Nxf5 19.Bxd8 Raxd8 20.Bc2[/font] draw (Piket-Ponomariov, Ol, Istanbul, 2003).
If [font color="purple"]16.Qh5[/font] then:

[font color="purple"]16...Na5 17.Ng5 Bxg5 18.Bxg5 Qb6 19.Bc2 g6 20.Qh4 Rfe8[/font] gives White the edge with dominance of the kingside in a mildly sharp position (Rhode-Lueers, Corres, 1999).
[font color="hotpink"]16...Qd3 17.Ba2 Qg6 18.Qxg6 hxg6 19.Bg5 Bf6 20.Rad1[/font] is equal (Kveinys-Sakalauskas, Lithuanian Ch, Siauliai, 2007).

If [font color="darkorange"]12...Na5 13.Bc2 b5 14.d5[/font] then:

If [font color="darkorange"]14...Re8[/font] then:

If [font color="darkorange"]15.Qd3 g6[/font] then:

If [font color="darkorange"]16.Bg5 Nxd5 17.Nxd5 exd5 18.Rxe7 Rxe7 19.Qc3[/font] then:

[font color="darkorange"]19...Raa7 20.Qf6 Qf8 21.Bd2 Re6 22.Qh4 Nc6[/font] gives Black an extra pawn (Z. Rahman-Bolzhin, Op, Dhaka, 2001).
If [font color="burgundy"]19...Nb7 20.Nd4 Bd7 21.Bb3 Rc8 22.Qf3 Be6[/font] gives Black an extra pawn and White more space (Van der Stricht-Rytshagov, Ol, Bled, 2002).

[font color="#D0A020"]16.b4 Nc4 17.dxe6 Bxe6 18.Nd4 Bd5 19.Bg5 Bb7[/font] is equal (Illescas Córdoba-Anand, IT, Dos Hermans, Spain, 1999).

If [font color="purple"]15.Bg5 h6 16.Bh4[/font] then:

[font color="purple"]16...Nxd5?! 17.Nxd5 exd5 18.Qd3 g6 19.Qe3 Be6 20.Qxh6[/font] gives White a promising kingside attack (Kramnik-Anand, IT, Dos Hermanas, 1999).
If [font color="hotpink"]16...Nc4 17.Qe2 Bd7 18.Rab1 exd5 19.Qd3 Kf8[/font] is equal.

If [font color="purple"]14...exd5[/font] then:

[font color="purple"]15.Bg5 Be6 16.Nd4 Qd7 17.f4 g6 18.f5[/font] is equal (S. Ivanov-Vorobiov, TM, St Petersburg, 2003).
If [font color="hotpink"]15.Nd4 Qd6 16.Qd3 Be6 17.Nf5 Bxf5 18.Qxf5 g6[/font] gives Black a small advantage in space (N. Pedersen-K. Berg, 1st Saturday July, Budapest, 2006).

[font color="darkorange"]12.Ba2 b5 13.Bg5 Bb7 14.Qd3[/font] then:

If [font color="darkorange"]14...Rc8 15.Rad1[/font] then:

If [font color="darkorange"]15...Re8 16.Bb1 g6 17.Ba2[/font] then:

[font color="darkorange"]17...b4 18.Na4 Ba8 19.Qxa6 bxa3 20.bxa3 Qa5 21.Qxa5[/font] gives White an extra pawn (Langeweg-Tseshkovsky, IT, Kislovodsk, 1972)
[font color="burgundy"]17...Na5 18.Ne5 Nd7 19.Nxf7 Kxf7 20.Bxe6+ Kg7 21.Bf4[/font] (Pachman-Unzicker, Ol, Tel Aviv, 1964).

[font color="#D0A020"]15...Nd5 16.Nxd5 Bxg5 17.Nb6 Nb4 18.axb4 Bxf3 19.Qxf3 Qxb6[/font] is equal (Bonderevsky-Sokolsky, Soviet Ch, Moscow, 1950).

If [font color="purple"]14...b4 15.Bb1 g6[/font] then:

[font color="purple"]16.axb4 Nxb4 17.Qe2 Kg7 18.Qd2 Ng8 19.Bxe7 Nxe7 20.Ne4[/font] is equal (Batuev-Kirillov, Soviet Ch ½-final, Leningrad, 1947).
If [font color="hotpink"]16.Na4 bxa3 17.bxa3 Qa5[/font] then:

If [font color="hotpink"]18.Nc5!? Nxd4 19.Qxd4 Bxf3[/font] then:

[font color="hotpink"]20.Bxg6? Qxc5! 21.Bxf6 fxg6[/font] leaves White nothing better than 22.Rxe6 Rxf6 23.Qxc5 Bxc5 24.Rxf6 Bd4 and therefore he resigns (S. Guliev-Blatny, IT, Stare Mesto, 1992).
If [font color="burgundy"]20.Be4 Rfd8 21.Qb4[/font] then:

[font color="burgundy"]21...Qxb4 22.axb4 Bxe4 23.Nxe4 Nxe4 24.Bxe7 Rd7 25.Rxe4 Rxe7[/font] gives Black an extra pawn and White more active Rooks.
[font color="#D0A020"]21...Qxc5?! 22.Qxc5 Bxc5 23.Bxf3 Kg7 24.Bxa8 Rxa8 25.Bxf6+ Kxf6[/font] gives Black only a pawn for the exchange, but he has more than enough compensation in the activity of the Bishop.

[font color="burgundy"]18.Bc2 Qc7 19.Bd1 Rfd8 20.Rc1 Qa5 21.Qb1[/font] remains equal.

If [font color="darkorange"]11.Bg5[/font] then:

If [font color="darkorange"]11...b6 12.a3 Bb7 13.Qd3[/font] then:

If [font color="darkorange"]13...Rc8 14.Rad1[/font] then:

If [font color="darkorange"]14...Nd5 15.Bxd5[/font] then:

If [font color="darkorange"]15...exd5 16.Qf5 g6 17.Qxd5 Qxd5 18.Nxd5 Bxg5 19.Nxg5 Rfd8 20.Ne7+ Nxe7 21.Rxe7[/font] gives White a slight edge (Pinter-H. Olafsson, IT, Copenhagen, 1985).
[font color="#D0A020"]15...Bxg5!? 16.Be4 h6 17.d5 exd5 18.Bxd5 Bf4 19.Qf5[/font] gives White a heavy advantage with his central activity (Lerner-Kaplan, IT, Givataim, 2005).

If [font color="purple"]14...g6?! 15.Bh6! Re8 16.Ng5 Bf8[/font] then:

[font color="purple"]17.Qh3?! Bxh6! 18.Qxh6 Nxd4 19.Bb5 Rf8 20.Ba6 Bxa6[/font] is equal and soon agreed drawn (Gurieli-Chiburdanidze, Candidates' TrmtW, Groningen, 1997).
[font color="hotpink"]17.Bxf8 Na5 18.Nxe6 fxe6 19.Bxe6+ Rxe6 20.Rxe6 Qxf8 21.d5[/font] gives White two extra pawns, including an advaced passer.

If [font color="purple"]13...h6[/font] then:

[font color="purple"]14.Bf4 Bd6 15.Bxd6 Qxd6 16.d5[/font] is equal (Balashov-Makarichev, Soviet Ch, Minsk, 1979).
[font color="hotpink"]14.Bh4 Nh5 15.Bg3 Nxg3 16.hxg3 Bf6 17.Rad1 Ne7 18.Ne5[/font] is equal (Kleinman-Kascheishvili, World Op, Philadelphia, 2012).

If [font color="purple"]11...a6 12.a4 Bd7 13.Qe2[/font] then:

If [font color="purple"]13...Rc8 14.Rad1[/font] then:

If [font color="purple"]14...Nd5 15.Bxd5 Bxg5 16.Be4[/font] then:

[font color="purple"]16...Bf6 17.d5 exd5 18.Nxd5 Be6 19.Nf4 Qb6 20.Qd3[/font] gives White a slight edge in space (Chekhov-Sveshnikov, IT, Lvov, 1983)
[font color="hotpink"]16...Bh6 17.d5 exd5 18.Rxd5[/font] then:

[font color="hotpink"]18...Rc7?! 19.Rd6 f5 20.Bc2 Kh8 21.Nd5 Rc8 22.Qd1 g6 23.Ne7[/font] Black resigns (Najdorf-Gheorghiu, IT, Mar del Plata, 1965).
[font color="burgundy"]18...Qc7 19.Bxh7+ Kxh7 20.Qd3+ Kg8 21.Rxd7 Qb6 22.Re2[/font] gives White an extra pawn and more activity (Mamedyarov-Gyimisi, Euro ChT, Goteborg, 2005)

If [font color="hotpink"]14...Nb4 15.Ne5 Be8 16.Bb3[/font] then:

[font color="hotpink"]16...Kh8 17.Qf3 Bc6 18.Qh3 Nfd5 19.Bxe7 Qxe7 20.Qg3[/font] is equal (Olafsson-Petrosian, IT, Los Angeles, 1963).
If [font color="burgundy"]16...Nfd5 17.Bd2 Bc6 18.Qg4[/font] then:

[font color="burgundy"]18...Nf6?! 19.Nxf7 Rxf7 20.Qxe6 Nbd5 21.Re5[/font] gives White two extra pawns, one being passed but isolated, and greater piece acticity; Black has White's passed pawn under blockade and reasonably good center (Lautier-Bologan, French ChT, Noyon, 2001).
If [font color="#D0A020"]18...Kh8 19.Nxd5 Nxd5 20.Rc1 Bd6 21.Bc2 f5[/font] remains equal.

If [font color="hotpink"]13...Nd5 14.Bxe7[/font] then:

If [font color="hotpink"]14...Ncxe7 15.Bxd5 Nxd5 16.Nxd5 exd5 17.Ne5[/font] then:

[font color="hotpink"]17...f6 18.Nd3 Re8 19.Qd2[/font] draw (Gelfand-Dreev, IT, Wijk aan Zee, 2002).
If [font color="#D0A020"]17...Bf5 18.Qf3 Be4 19.Qb3 Qd6 20.Rac1[/font] gives White a small advantage with an active Rook and Queen (Lukacs-Pavosovic, 1st Saturday June, Budapest, 1994).

[font color="burgundy"]14...Ndxe7 15.Rad1 Nb4 16.Ne5 Nbd5 17.Nxd5 Nxd5 18.Bxd5 exd5[/font] is equal (Yanofsky-Golembek, IT, Karlovy Vary, 1948)

7...Be7

If [font color="red"]7...cxd4 8.exd4 Be7 9.0-0 0-0 10.Re1[/font] then:

If [font color="red"]10...Nf6[/font] then:

If [font color="red"]11.Bg5 Nb4 12.Bb1[/font] then:

If [font color="red"]12...b6!?[/font] then:

If [font color="red"]13.Ne5 Bb7[/font] then:

If [font color="red"]14.Re3 g6 15.Rg3[/font] then:

If [font color="red"]15...Rc8!? 16.Bh6![/font] then:

If [font color="red"]16...Re8?[/font] then after [font color="red"]17.a3! Nc6 18.Nxg6 hxg6 19.Bxg6 fxg6 20.Qb1[/font] White wins (Keene-Miles, IT 7576, Hastings, 1976).
[font color="burgundy"]16...Bd6 17.Bxf8 Kxf8 18.Qe1 Bb8 19.Qe3 Kg8 20.Rh3[/font] gives a better center and the advantage in space.

[font color="#D0A020"]15...Nbd5 16.Bh6 Nxc3 17.bxc3 Re8 18.Bd3 Qc7 19.Qc2[/font] gives White a small advantage in space.

[font color="darkpink"]14.a3!? Nbd5 15.Qd3 g6 16.h4 Nxc3 17.bxc3 Nh5[/font] is equal (Melia-Purtseladze, World Youth GU18, Belfort, 2005).

If [font color="darkred"]13.a3 Nbd5 14.Qd3 g6[/font] then:

If [font color="darkred"]15.Ne5 Bb7 16.Bh6 Re8 17.Qh3 Bf8 18.Bg5 Be7[/font] then:

[font color="darkred"]19.Bd3 a6!? 20.Rac1 Rc8 21.Nxd5 Qxd5 22.Bc4 Qxd4[/font] gives White a powerful advantage (Beim-Berendsen, Op, Dieren, 1997).
If [font color="magenta"]19.Bh6 Bf8[/font] then:

[font color="magenta"]20.Bd2!? Nh5 21.Be4 f5 22.Bf3 Ndf4 23.Bxf4 Nxf4 24.Qg3[/font] gives White a slight advantage in space (Khurtsidze-Gaponenko, World ChTW, Ekaterinberg, 2007).
[font color="darkorange"]20.Bg5 Nxc3 21.bxc3 Bg7 22.Qh4 h6 23.Bxh6![/font] gives White a powerful advantage.

[font color="darkorchid"]15.Nxd5 Nxd5 16.Bh6 Re8 17.Ne5 Bf8 18.Qf3 Qf6[/font] is equal (Nei-Smyslov, Soviet Ch, Tbilisi, 1967).

If [font color="darkred"]12...Bd7! 13.Ne5[/font] then:

If [font color="darkred"]13...Bc6 14.Re3 g6 15.Rg3 Nd7 16.Bh6 Nxe5 17.Bxf8[/font] then:

[font color="darkred"]17...Kxf8 18.dxe5 Qxd1+ 19.Nxd1 Rd8 20.Nc3[/font] gives White a small advantage in space (Portisch-Pachman, IT, Moscow, 1961).
[font color="burgundy"]17...Bxf8 18.dxe5 Qxd1+ 19.Nxd1 Rd8 20.Nc3 Rd2 21.Be4[/font] gives White a small advantage in space.

If [font color="magenta"]13...Rc8 14.Re3 g6 15.Bh6 Re8 16.Rg3 Bc6[/font] then:

[font color="magenta"]17.a3 Nbd5[/font] then:

[font color="magenta"]18.Bxg6 hxg6 19.Nxg6 fxg6 20.Qd3[/font] Black resigns (Shariyazdanov-Petukhov, Russian ChT, Sochi, 2004).
If [font color="darkorange"]18.Nxg6?! hxg6! 19.Bxg6 Bd6 20.Bxf7+ Kxf7 21.Rg7+ Kf8[/font] then:

[font color="darkorange"]22.Nxd5!? Bxd5! 23.Qd3? Be4! 24.Rg3+ Kf7[/font] draw (Filip-Pogats, Maroczy Mem, Budapest, 1961).
[font color="purple"]22.Rd7+ Kg8 23.Rxd8 Rexd8 24.Qf3 Kf7 25.Ne4[/font] gives White a powerful attack; the material balance is a Queen and three pawns for White against a Rook and two minor pieces.

[font color="#D0A020"]17.Bxg6?! hxg6! 18.Qb1 Nc2 19.Qxc2 Be4 20.Qd1[/font] gives Black an uphill battle, but at least now it's a battle (Tkachiev-B. Vuckovic, Ol, Dresden, 2008).

If [font color="darkred"]11.a3 b6[/font] then:

If [font color="darkred"]12.Bg5 Bb7 13.Bc2 Rc8 14.Qd3 g6[/font] then:

If [font color="darkred"]15.Rad1 Nd5 16.Bh6 Re8 17.Ba4[/font] then:

If [font color="darkred"]17...Nxc3 18.bxc3[/font] then:

[font color="darkred"]18...Qd6 19.c4 Red8 20.d5 exd5 21.cxd5 Na5 22.Qe2[/font] is equal (Safarli-Semerene, Ol, Khanty-Mansiysk, 2010).
If [font color="magenta"]18...Bf6!? 19.c4![/font] (White takes a small advantage in space) then:

If [font color="magenta"]19...Re7?! 20.d5! exd5 21.cxd5 Rxe1+ 22.Rxe1[/font] then:

[font color="magenta"]22...Qd6? 23.Bxc6! Bxc6 24.Qa6[/font] Black resigns as she must lose a piece (Zhukova-Ciuksyte, Euro ChTW, Crete, 2007).
[font color="purple"]22...Nb8 23.d6 Nd7 24.h3 Nc5 25.Qd1 Bxf3 26.gxf3[/font] gives White an advancing passed pawn and power in the center.

[font color="darkorange"]19...Qd6 20.Ng5 Nxd4 21.Bxe8 Rxe8 22.Ne4 Bxe4 23.Qxe4[/font] continues to gives White a small advantage.

If [font color="magenta"]17...a6 18.Nxd5 Qxd5 19.Qe3 Bf6 20.Bb3[/font] then:

If [font color="magenta"]20...Qd7 21.d5 exd5 22.Qxb6 Rxe1+ 23.Rxe1 Bxb2 24.Bxd5[/font] gives White a small advantage in space (Beliavsky-Karpov, Soviet TT, 1986).
If [font color="darkorange"]20...Qd8?! 21.Ne5![/font] then:

[font color="darkorange"]21...Qe7? 22.Ng4! Na5 23.Ba2 Nc4 24.Qf4[/font] gives White a powerful position that he eventually won (Kobalia-Jobava, Eruo Ch, Plovdiv, 2012).
[font color="purple"]21...Bxe5 22.dxe5 Qc7 23.Rd6 Ne7 24.Qxb6 Nf5 25.Bg5[/font] gives White an extra pawn and more space, but Black is still in the game.

If [font color="magenta"]15.Bh6 Re8 16.Rac1[/font] then:

[font color="magenta"]16...Qd6 17.h3 Bf8 18.Bg5 Bg7 19.Rcd1 Na5 20.Ne5[/font] gives White a small advantage in space (Hort-Mukhin, Czechoslovakian Ch, Lhacovice, 1973).
[font color="darkorange"]16...a6 17.Bb1[/font] draw (Ginzburg-Hobaica, IT Mar de Ajo, Argentina, 2009).

If [font color="magenta"]12.Bc2 Ba6[/font] then:

If [font color="magenta"]13.Bg5 Rc8 14.Qd2 Nd5[/font] then:

[font color="magenta"]15.Nxd5 Qxd5[/font] then:

[font color="magenta"]16.Be4 Bxg5 17.Nxg5 Qxd4 18.Bxh7+ Kh8 19.Rad1[/font] is equal, perhaps slanting White's way (Gheam Megami-Antoniewski, Bundesliga 1112, Mülheim, 2012).
[font color="burgundy"]16.Rad1 Bxg5 17.Nxg5 h6 18.Nf3 Ne7 19.Ne5 Qd6[/font] is equal (Fressinet-Malikhov, IT, Selfoss, 2003).

[font color="#D0A020"]15.h4 Nxc3 16.bxc3 Qc7 17.Qe3 Bc4 18.Nd2 Na5[/font] is equal(Sulskis-Wu Shaobin, Ol, Palma de Mallorca, 2004).

If [font color="darkorange"]13.b4[/font] then:

If [font color="darkorange"]13...Rc8 14.Bb2[/font] then:

If [font color="darkorange"]14...Bc4 15.b5 Na5 16.Ne5[/font] then:

[font color="darkorange"]16...a6 17.a4 axb5 18.axb5 Bd5 19.Qd3 Nc4 20.Bc1[/font] gives White a small advantage in space (Bartholee-Pogaets, Op, Wijk aan Zee, 1988).
[font color="burgundy"]16...Qd6 17.a4 Rfd8 18.Ne4 Nxe4 19.Bxe4[/font] gives White the advantage in space (Tringov-Vasiukov, IT, Cacak, 1994).

[font color="#D0A020"]14...Nd5 15.b5 Nxc3 16.Qd3 g6 17.Bxc3 Qc7 18.bxa6 Na5[/font] draw (Anand-Adams, Op, London, 1987).

If [font color="purple"]13...Bc4[/font] then:

If [font color="purple"]14.b5 Na5 15.Ne5 Rc8 16.Re3[/font] then:

[font color="purple"]16...g6 17.Rh3 Bd5 18.Qd2 Bb3 19.Bb1 Nc4[/font] gives Black the advantage thanks to his better minor pieces (Buturin-Savon, IT, Lvov, 1981).
[font color="#D0A020"]16...Rc7!? 17.Rg3! Re8 18.Bh6 Bf8 19.Bg5[/font] gives White the advantage in space (Kaidanov-Anand, IT, Moscow, 1987).

[font color="hotpink"]14.Ne5 Nxe5 15.dxe5 Qxd1 16.Rxd1 Nd5 17.Nxd5 Bxd5[/font] is equal (Gheorghiu-Henley, Surakarta, Indonesia, 1982).

If [font color="darkred"]10...Bf6 11.Be4[/font] then:

If [font color="darkred"]11...Nce7 12.Ne5 Bd7 13.Qd3[/font] then:

If [font color="darkred"]13...g6 14.Bh6 Bg7 15.Bxg7 Kxg7 16.Bxd5[/font] then:

If [font color="darkred"]16...exd5[/font] then:

If [font color="darkred"]17.Re2 f6 18.Nxd7 Qxd7 19.Rae1 Nc6[/font] then:

[font color="darkred"]20.h3 Rae8 21.Rxe8 Rxe8 22.Rxe8 Qxe8 23.Nxd5 Qe1+ 24.Qf1 Qxf1+ 25.Kxf1 Nxd4[/font] draw (Efimenko-Lahno, IT, Montreal, 2004).
[font color="burgundy"]20.g3 Rf7 21.Na4 b6 22.Nc3 Rd8 23.Kg2 Qf5 24.Rd2 Qd7 25.h3 Re7 26.Rxe7+ Nxe7[/font] draw (Topalov-Vyzmanavin, PCA Qual, Groningen, 1993).

[font color="#D0A020"]17.Qd2 Bf5 18.Re2 f6 19.Nd3 Bxd3 20.Qxd3 Qd7[/font] leave leaves material and space equal, but White's command of the e-file gives him a slight edge. (Potkin-And. Volokitin, Euro Ch, Rijeka, 2010)

If [font color="magenta"]16...Nxd5 17.Nxd5 exd5 18.Qb3[/font] then:

[font color="magenta"]18...Bc6 19.Rac1 Rc8 20.Qa3 Qb6 21.Rc5 Rfe8 22.Re3[/font] gives White a small advantage in space (Beim-Teske, Op, Aschach, 2001).
[font color="darkorange"]18...f6?! 19.Nd3! Bf5 20.Qxb7+ Rf7 21.Qa6 Rb8 22.Re2[/font] leaves White with an extra pawn (Gligoric-Elikases, IT, Buenos Aires, 1960).

If [font color="magenta"]13...h6!?[/font] then:

[font color="magenta"]14.Qg3! Bc6 15.Ng4 h5?! 16.Qh3?! g6! 17.Nxf6+ Nxf6 18.Bxc6 bxc6 19.Bg5[/font] gives White a small advantage in space (Illescas Córdoba-Basin, IT León, 1990).
[font color="darkorange"]14.Qf3?! Bc6! 15.Ng4 h5 16.Nxf6+ Nxf6 17.Bxc6 bxc6[/font] is equal (Van Wely-Ivanchuk, Amber Rapid, Nice, 2008).

If [font color="magenta"]11...Qd6[/font] then:

[font color="magenta"]12.a3 Rd8 13.Bxd5 exd5 14.Nb5 Qf8 15.h3[/font] gives White a slight edge in space (Averbakh-Furman, Soviet Ch, Tbilisi, 1959).
[font color="darkorange"]12.Bc2 Nce7 13.Ne5 Ng6 14.Ng4 Be7 15.Ne5[/font] gives White a small advantage in space (Kavalek-Andersson, Match, Washington, 1978).

8.a3 0-0 9.Qc2 (N)

If [font color="red"]9.0-0 cxd4 10.exd4[/font] then:

If [font color="red"]10...Bf6[/font] then:

If [font color="red"]11.Be4 Nce7 12.Qd3[/font] then:

If [font color="red"]12...g6 13.Bh6 Bg7 14.Bxg7 Kxg7[/font] then:

If [font color="red"]15.Ne5 b6[/font] then:

If [font color="red"]16.Nxd5 Nxd5[/font] then:

[font color="red"]17.Rfe1!? Bb7 18.Qg3 Qd6 19.Rad1 Rac8[/font] is equal (Portisch-Averbakh, IT, Budapest, 1970).
If [font color="darkred"]17.Rac1 Bb7[/font] then:

[font color="darkred"]18.Qd2 f6 19.Ng4 Rc8 20.Rxc8 Bxc8 21.Bxd5 exd5[/font] gives White a slight edge in space.
[font color="magenta"]18.f3!? f6 19.Ng4 h5 20.Nf2 Rc8 21.Rxc8 Qxc8[/font] is equal.[/lil]

[font color="magenta"]16.Qd2 Bb7 17.Rfe1 Rc8 18.Rac1 Rc7 19.Ng4[/font] gives White a slight advantage in space (Filip-Platonov, IT, Beverwijk, 1970).

If [font color="darkred"]11.Re1[/font] then:

If [font color="darkred"]11...Qb6[/font] then:

[font color="darkred"]12.Be4 Nce7 13.Ne5 g6 14.Bh6 Bg7 15.Bxg7 Kxg7 16.Qd2[/font] gives White a small advantage in space (Gulko-Beliavsky, IT, Groningen, 1994).
[font color="burgundy"]12.Na4 Qd8 13.Nc3 Qb6[/font] draw (W. Schmidt-Pinter, ZT, Baile Herculane, 1982).

If [font color="magenta"]11...Bd7 12.Bc2[/font] then:

[font color="magenta"]12...Rc8 13.Ne4 Be7 14.Qd3 g6 15.Bd2 Qb6 16.b4[/font] gives White a small advantage in space (Gulko-Kaidanov, US Ch, Key West, Florida, 1994).
[font color="darkorange"]12...Nce7 13.Qd3 Ng6 14.Ne4 Rc8 15.Nxf6+ Nxf6 16.Bg5[/font] is equal (Sax-Drazic, Op, Split, 2008).

If [font color="darkred"]12...h6 13.Ne5 Nxc3[/font] then:

[font color="darkred"]14.Qxc3 Nf5 15.Be3 Nd6 16.Bf3 Bd7 17.Qb4[/font] gives White a small advantage in space (Karpov-Timman, IT, Moscow, 1981).
[font color="magenta"]14.bxc3 Bxe5 15.dxe5 Qxd3 16.Bxd3 Bd7 17.Be3 Rfc8[/font] is equal (Ujtelky-Niephus, Euro ChT, Oberhausen, 1961).

If [font color="darkred"]15.Rfe1[/font] then:

If [font color="darkred"]15...b6 16.Bxd5 Nxd5 17.Nxd5 Qxd5 18.Re5 Qd6[/font] then:

[font color="darkred"]19.d5 Bb7 20.Qc3 f6 21.Rxe6 Qxd5 22.Rae1 Rf7 23.Rxf6[/font] Black resigns (Dr. Hübner-Portisch, Rpd IT, Frankfort, 1998).
[font color="purple"]19.Rae1 Bb7 20.Ng5 Rad8 21.d5 Bxd5 22.Qd4 Ba8[/font] is equal after the center is resolved (Miles-Portisch, IT, Bugojno, 1978).

[font color="darkorange"]15...Bd7 16.Bxd5 Nxd5 17.Nxd5 exd5 18.Qc3[/font] gives White a slight advantage in space.

If [font color="darkred"]10...Nxc3 11.bxc3 b6[/font] then:

If [font color="darkred"]12.Qe2 Bb7 13.Bb2[/font] then:

If [font color="darkred"]13...Bf6 14.Rad1 Rc8[/font] then:

If [font color="darkred"]15.c4 Na5 16.Ne5 Bxe5 17.dxe5[/font] then:

[font color="darkred"]17...Qc7 18.Qh5 g6 19.Qh6 Qc6[/font] gives Black a small advantage in space (Kasparov-Tukmakov, Soviet Union, 1982).
[font color="burgundy"]17...Qh4 18.f4 Nb3 19.Bc2 Nc5 20.f5 Rfd8[/font] is equal (Kozul-B. Lalic, Yugoslav Ch, Pljevlja, 1989).

If [font color="magenta"]15.Rfe1 Na5[/font] then:

[font color="magenta"]16.Nd2 g6 17.Rc1 Bg7 18.Ne4 Bxe4 19.Bxe4 Nc4[/font] gives White a small advantage in space; White's light-bound Bishop is immobile (Panno-Horberg, Ol, Amsterdam, 1954).
[font color="darkorange"]16.Ne5 g6 17.c4 Bg7 18.Bc3 Nc6 19.Be4[/font] is equal (Wicker-pedersen, IT, Esbjerg, 1981)

If [font color="magenta"]13...Na5 14.Ne5[/font] then:

[font color="magenta"]14...Rc8 15.Rad1 Bd6 16.f4 Qc7 17.a4 f6[/font] gives Black an extra pawn and White a small advantage in space (Christiansen-Computer, Comp Trmt, 1995)./li]
[font color="darkorange"]14...Bd6 15.f4 Rc8 16.c4 Qc7 17.Rac1 f5[/font] is equal (Vyzmanavin-Belov, IT, Moscow, 1989).

If [font color="magenta"]12.Qc2 g6 13.Bh6 Re8 14.h4[/font] then:

[font color="magenta"]14...Bf8 15.Qd2 Bb7 16.Rae1 Rc8 17.h5 Bxh6 18.Qxh6[/font] gives Black stronger pawns and White more space (J. Polgar-Groszpeter, Op, Budapest, 1992).
[font color="darkorange"]14...Bxh4 15.Bb5 Bb7 16.Qe4 Nxd4 17.Qxd4 Bf6 18.Qe3[/font] gives White a strong initiative and piece for two pawns (Yermolinsky-Aseev, IT, Leningrad, 1984).

9...cxd4

White has a slight edge in space.

10.exd4!?

White passes the opportunity to grab a pawn.
[font color="red"]10.Bxh7+ Kh8 11.exd4 Nf6 12.Be4[/font] continues to give White a slight advantage; Black has some compensation for the pawn minus in that White is saddled with an isolated d-pawn.

10...f5!

The game is equal.
[font color="red"]10...Nf6! 11.Be3 Bd7 12.h3 Rc8 13.Rc1 a6 14.0-0[/font] is equal.

11.0-0 Bf6 12.Nxd5

If [font color="red"]12.Be3 Nxe3 13.fxe3 Kh8[/font] then:

[font color="red"]14.Ne2 e5 15.Bxf5 Bxf5 16.Qxf5 exd4 17.Nfxd4[/font] remains equal.
[font color="darkred"]14.Kh1 Bd7 15.Bc4 Rc8 16.Ba2 b5 17.Qd2 b4[/font] remains equal.

12...Qxd5 13.Be3 b5 14.Qe2 Bb7 15.Rac1!?

White passes on the opportunity to win the b-pawn.
[font color="red"]15.Bxb5 f4 16.Bc4 Qe4 17.Bd3 Qd5 18.Bc4 etc.[/font] draws.
[font color="blue"]15.a4 b4 16.Rfd1 Na5 17.Rac1 Rac8 18.Rxc8 Rxc8[/font] remains equal.

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 15.Ra1c1[/center]

15...a6!

Black fortifies the b-pawn and takes a small advantage in space.

16.Rfd1

If [font color="red"]16.Rc5 Qd6 17.Rfc1 Rad8[/font] then:

[font color="red"]18.b4 Ne7 19.g3 Bxf3 20.Qxf3 Bxd4 21.Bxd4 Qxd4[/font] is equal.
[font color="darkred"]18.Bb1 Kh8 19.Ba2 Nxd4 20.Nxd4 Bxd4 21.Bxd4 Qxd4[/font] gives Black command of the c-file and the initiative against the pawn at e6; Black has command of the d-file and a little more space.

16...f4 17.Rc5 Qd6 18.Qc2

[font color="red"]18.Bxf4!? Qxf4! 19.Qxe6+ Kh8 20.Rxc6 Bxc6 21.Qxc6 Bxd4[/font] gives Black the exchange for a pawn.

18...fxe3 19.Bxh7+

If [font color="red"]19.fxe3? h6 20.Bh7+ Kh8[/font] then:

If [font color="red"]21.Be4 Rac8 22.b4 Qd7[/font] then:

If [font color="red"]23.d5 Nd8 24.Rxc8[/font] then:

[font color="red"]24...Qxc8 25.Qxc8 Bxc8 26.d6 Bd7 27.Bg6 Nc6 28.Be4 Ne5[/font] leaves Black with an extra piece
If [font color="burgundy"]24...Bxc8!? 25.Qc5 Rf7 26.Bb1 Qc7 27.d6 Qxc5 28.bxc5 Bb7.[/font]

If [font color="#D0A020"]23.Qb1 Ne7 24.Bxb7 Qxb7 25.e4 Nc6 26.Kh1 Qd7 27.Qa1 Rfd8.[/font]

If [font color="darkred"]21.b4 Ne7[/font] then:

[font color="darkred"]22.Be4 Bxe4 23.Qxe4 a5 24.Qd3 axb4 25.axb4 Ra2[/font] gives Black an extra piece.
If [font color="magenta"]22.Ne5 Bg5 23.Rc3 Nd5[/font] then:

[font color="magenta"]24.Ng6+ Kxh7 25.Nxf8+ Kg8 26.Qh7+ Kxf8 27.Rf1+ Nf6[/font] gives Black two pieces for a Rook and a pawn; White has no opprtunities for effective counterplay.
If [font color="darkorange"]24.Bd3[/font] then Black wins quickly after [font color="darkorange"]24...Nxe3 25.Qb1 Nxd1 26.Qxd1 Be3+ 27.Kh1 Rf2.[/font]

19...Kh8 20.fxe3 Ne7 21.e4?!

White weakens d4 and obstructs the line of communication between his Queen and Bishop.
If [font color="red"]21.Rh5 Rac8 22.Ne5 Bxe5 23.dxe5 Qb6[/font] then:

If [font color="red"]24.Qd3 Rcd8 25.Qxd8 Qxe3+ 26.Kh1[/font] then:

[font color="red"]26...Bxg2+!! 27.Kxg2 Qf3+ 28.Kg1 Qf2+ etc.[/font] draws.
White is threatening [font color="burgundy"]27.Qxf8+ Ng8 28.Qxg8#.[/font]

If [font color="darkred"]24.Bg6+!? Kg8 25.Bh7+ Kf7[/font] then:

[font color="darkred"]26.Qf2+ Ke8 27.Qg3 Rc7 28.h4 Nd5 29.Rd3 Kd8[/font] gives Black a piece for two weak pawns; White has opportunities for counterplay.
[font color="magenta"]26.Qd3 Bd5 27.Rg5 Rcd8 28.Rf1+ Ke8 29.Bg6+ Kd7[/font] leaves Black with a Knight agaist two weak pawns; White has fewer chances to fight back..

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 21.e34[/center]

21...Rac8!?

Black takes a small advantage in space, but could have more.
If [font color="red"]21...Qf4! 22.Rh5[/font] then:

If [font color="red"]22...g6! 23.Bxg6+ Kg7 24.Bh7[/font] then:

[font color="red"]24...Rac8 25.Qd2 Qxd2 26.Rxd2 Ng6 27.Bxg6 Kxg6[/font] leaves White with an extra piece.
If [font color="darkred"]24...Rh8?! 25.e5! Bxf3[/font] then:

[font color="darkred"]26.exf6+ Kf7 27.Qf2 Nd5 28.gxf3 Nxf6 29.Rh4 Qg5+[/font] continues to give Black a piece for two pawns, but White may have some opportunities for counterplay.
If [font color="magenta"]26.gxf3?[/font] then Black wins after [font color="magenta"]26...Qe3+ 27.Kh1 Qxf3+ 28.Qg2+ Qxg2+ 29.Kxg2 Bh4.[/font]

If [font color="darkred"]22...Ng8[/font] then:

[font color="darkred"]23.Bg6+ Nh6 24.Qd2 Qxd2 25.Rxd2 Kg8 26.h3 Be7[/font] gives Black a piece for two pawns.
If [font color="magenta"]23.Qc1?[/font] then Black wins after [font color="magenta"]23...Bxd4+! 24.Nxd4 Qf2+ 25.Kh1 Nf6.[/font]

22.e5!

The game is equal.

21...Bxe5

If [font color="red"]22...Rxc5 23.dxc5 Qc7[/font] then:

[font color="red"]24.Be4 Bxe4 25.Qxe4 Qxc5+ 26.Kh1 Bxe5 27.Nxe5 Qf2[/font] continues to give Black a small advantage in space.
[font color="darkred"]24.exf6 Rxf6 25.c6 Bxc6 26.Be4 Qa7+ 27.Kh1 Bd5[/font] continues to give Black a small advantage in space.

23.Nxe5 Rxc5 24.Ng6+

If [font color="red"]24.Qxc5?! Qxc5 25.dxc5 Kxh7 26.Rd7[/font] then:

[font color="red"]26...Nc6 27.Nxc6 Bxc6 28.Rd6 Bd5 29.Rxa6 e5[/font] gives Black a piece for two pawns.
If [font color="darkred"]26...Rc8?![/font] then:

[font color="darkred"]27.Rxb7! Rxc5 28.Nd3 Rd5 29.Rxe7 Rxd3 30.Rxe6[/font] gives White an extra pawn, but it counts for very little in this kind of Rook ending.
[font color="magenta"]27.Rxe7!? Rxc5! 28.Rxb7 Rxe5[/font] is equal and likely drawn.

24...Nxg6 25.dxc5 Be4 26.Rxd6

[font color="red"]26.Bxg6 Bxc2 27.Rxd6 Bxg6 28.h4[/font] transposes into [font color="red"]the note to White's 28th move.[/font]

26...Bxc2 27.Bxg6 Bxg6 28.Rxe6

[font color="red"]28.h4 a5 29.Rxe6 Bf7 30.Rb6 Bc4 31.b4 a4[/font] gives Black a Bishop for two pawns; White has pawn majorities on both wings and a passed pawn on the queenside.
If [font color="blue"]28.h3!? a5 29.Rxe6[/font] then:

[font color="blue"]29...Bf7 30.Re7 a4 31.Rb7 Bc4[/font] gives Black more activity; White has three pawns for the Bishop.
If [font color="darkblue"]29...Kh7? 30.g4! a4 31.Kg2 Rd8[/font] then:

[font color="darkblue"]32.Kf2 Rd2+ 33.Re2 Rd5 34.c6 Rc5 35.Re6 Bf7[/font] give White a strong initiative and a Bishop for only two pawns while White's passer is deadwood.
If [font color="dodgerblue"]32.Rd6[/font] then Black wins after [font color="dodgerblue"]32...Rxd6 33.cxd6 Be8 34.Kg3 g5.[/font]

If [font color="#008000"]28.Rxa6?! Bd3! 29.h4 e5[/font] then:

[font color="#008000"]30.Re6 e4 31.g4 Rf1+ 32.Kg2 Rc1 33.c6 Bc4[/font] gives Black more activity, but White has three pawns for a Bishop and can generate counterplay.
If [font color="#20C020"]30.Rd6 e4 31.Re6 Kg8 32.Re5 Rf1+ 33.Kh2 Rf2[/font] gives Black more activity, but White has two pawns for a Bishop and can generate counterplay.

28...Bd3 29.h4

If [font color="red"]29.h3 a5[/font] then:

[font color="red"]30.Rd6 Bc4 31.b4 a4 32.Kh2 Kg8 33.h4 Re8[/font] continues to give Black a small advantage with more activity and a Bishop for three pawns.
[font color="darkred"]30.b4 axb4 31.axb4 Rf1+ 32.Kh2 Rf4 33.Rd6 Bc2[/font] will soon leaves Black with an extra piece for only one pawn.

29...a5

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 29..a6a5[/center]

Thoughout this phase of the game, Black has stood at best slightly better, but now misses an opportunity to take a more solid advantage.
[font color="red"]29...Rf1+ 30.Kh2 b4 31.axb4 Rf4 32.c6 Rxh4+[/font] continues to give Black a Bishop for two pawns, but White's passer is becoming more worrisome.

30.c6 Rf1+ 31.Kh2 Rc1 32.Re3 Bb1

[font color="red"]32...Bh7!? 33.Rc3! Rxc3 34.bxc3 Bf5 35.Kg3 Kg8 36.Kf4[/font] is equal; White has three pawns for the Bishop.

33.Rc3 Rxc3 34.bxc3 Kg8

If [font color="red"]34...g6 35.Kg3 Kg7[/font] then:

[font color="red"]36.Kg4 Kf6 37.c7 Bf5+ 38.Kf4 Bc8 39.g3 Bf5[/font] gives Black a Bishop to stop the foremost c-pawn.
[font color="darkred"]36.c7 Bf5 37.Kf4 Kf6 38.g4 Bd7 39.Kg3 Bc8[/font] leaves Black with a Bishop for two pawns, but with the Bishop unable to wander too far from c8 the advantage is insufficient to secure more than a small advantage.

35.c7 Bf5 36.Kg3 Kf7 37.Kf4 Bc8?!

While this provides iron restraint against White's advanced passer, it does nothing to prevent White's King from becoming more active.
If [font color="red"]37...Kf6[/font] (the Bishop is fine at f4, but this move prevents the King from advancing) then:

[font color="red"]38.g4 Bc8 39.Kf3 g5 40.hxg5+ Kxg5 41.Ke3 Kxg4[/font] still gives Black all the winning chances, but as long as the Bishop must keep watch on the formost c-pawn, nothing is certain.
[font color="darkred"]38.g3 Bc8 39.Ke4 Ke6 40.Kf4 Kd5 41.Kf3 Ke5[/font] leaves Black with all the winning chances, which is not the same as saying he will win.

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 37..Bf5c8[/center]

38.Kg5!

White grabs some needed space on the kingside; the g-pawn in order to free the Bishop.

38...Bd7 39.h5?

The pawn was better off on a dark square, out of reach of the Bishop.
[font color="red"]39.g3 Bc8 40.Kf4 Be6 41.Kg5 Bd7 42.Kf4 Kf6[/font] gives Black a slight advantage with a Bishop for two pawns; the Bishop cannot lose contact with the c8 square.

39...Be6!

The Bishop still has watch over c8, but on e6 it also makes it difficult for the White King to maneuver.

40.g3

White can only hope for Black to err; as soon as Black plays his last reserve pawn tempo, he is in Zugzwang.
If [font color="red"]40.Kf4 Ke8 41.c8Q+ Bxc8 42.Kg5 Ke7[/font] then:

[font color="red"]43.g4 Be6 44.Kf4 a4 45.g5 Bf7 46.g6 Bd5[/font] leaves White no way save any of his pawns on either side of the board.
If [font color="darkred"]43.Kg6 Bg4 44.Kg5 Be2[/font] then:

[font color="darkred"]45.g4 Ke6 46.Kg6 Kd5 47.g5 Kc4 48.Kxg7 Bxh5[/font] is a clear win for Black.
If [font color="magenta"]45.Kf4[/font] then Black wins after [font color="magenta"]45...Bxh5 46.Ke3 Kd6.[/font]

40...a4 41.g4 Kf8?

Black throws away his advantage. He should move his King toward the c-pawn.
If [font color="red"]41...Ke7[/font] then:

[font color="red"]42.Kg6[/font] then Black wins after [font color="red"]42...Bxg4 43.Kg5 Bh3 44.Kg6 Kf8 45.Kg5 Kf7.[/font]
If [font color="darkred"]42.Kf4[/font] then Black wins after [font color="darkred"]42...Kd7 43.c8Q+ Kxc8 44.Kg3 Kd7 45.Kf4 Kc6.[/font]

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 41...Kf7f8[/center]

42.Kf4!

The game is equal.
If [font color="red"]42.Kg6?[/font] then Black wins easily after [font color="red"]42...Bxg4 43.Kg5 Bh3 44.Kh4 Be6 45.Kg5.[/font]

42...Ke7 43.g5 Kd7 44.Ke5 Bg8 45.c8Q+

The purpose of this is to draw the Black King one more tempo away from the action on the kingside.

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 45.c7c8Q[/center]

45...Kxc8 46.Kd6 Kd8 47.Kc6?

If [font color="red"]47.Kc5![/font] (attacking the pawn and preventing 47...Bc4, protecting the pawn) [font color="red"]47...Ke7 48.h6![/font] then:

[font color="red"]48...g6 49.Kxb5 Ke6 50.Kxa4 Kf5 51.Kb5 Kxg5 52.a4 Kxh6[/font] still gives Black the edge, but it's unlikely that he'll convert it.
[font color="darkred"]48...gxh6 49.gxh6 Bh7 50.Kxb5 Bc2 51.c4 Kd7 52.Kb6[/font] will result in a draw.

47...Ke7?

Black misses the obvious winning move. In Kramnik's defense, both players appeared physically exhausted during the post-game press conference (and some of you say chess isn't a sport).
If [font color="red"]47...Bc4! 48.h6 gxh6 49.gxh6 Bd3[/font] (there is no other move; Black must play to intercept the pawn at h7) [font color="red"]50.Kd5 Ke7[/font] then:

If [font color="red"]51.Kd4[/font] then Black wins after [font color="red"]51...Bg6 52.Kc5 Kf6 53.Kxb5 Be8+ 54.Kb6 Kg6.[/font]
[font color="darkred"]51.Kc5[/font] loses immediately to [font color="darkred"]51...Kf7 52.c4 Bxc4 53.Kd4 Kg6.[/font]

48.Kxb5?

White misses a chance to maximaze his drawing chances.
[font color="red"]48.h6! g6 49.Kxb5 Ke6 50.Kxa4 Kf5 51.c4! Kxg5[/font] leaves Black technically better, but it is doubtful he will be able to convert such a minute advantage to a win.

48...Ke6?

Black misses another chance to put it away. The King should travel on dark squares so as not to interfere with the Bishop eying the queenside.
If [font color="red"]48...Bf7![/font] then:

If [font color="red"]49.Kxa4 Bxh5 50.Kb5 Kd6[/font] then:

[font color="red"]51.Kb6 Be8 52.Kb7 Bc6+ 53.Kb6 Kd5 54.Kc7[/font] then Black wins after [font color="red"]54...Ba4 55.Kd8 Ke5 56.g6 Kf6[/font] when Black captures White's g-pawn and then runs with his own.
If [font color="burgundy]54.c4+[/font] then Black wins after [font color="burgundy"]Kd6 55.Ka5 Kc5.[/font]

If [font color="magenta"]51.Kc4[/font] then Black wins after [font color="magenta]51...Be8 52.Kd4 Bc6 53.c4 Ba4 54.c5+ Kc6.[/font]

[font color="darkred"]49.h6 gxh6 50.gxh6 Be8+ 51.Kc5 Kf6 52.Kd4 Kg6[/font] destroys the h-pawn.

49.Kxa4!

After this, White should draw with a minimus of difficulty.[font color="red"]49.c4! Kf5 50.h6 g6 51.Kxa4 Kxg5 52.Kb5 Kxh6[/font] gives Black, with the Bishop, a slight edge, but this will most likely result in a draw,

49...Kf5 50.g6?

White moves the wrong pawn.
[font color="red"]50.h6 g6 51.Kb5 Kxg5 52.a4 Kxh6[/font] still gives White nothing more than a slight edge.

[center]BLACK: Vladimir Kramnik[/center]

[center][/center]

[center]WHITE: Levon Aronian[/center][center]Position after 50.g5g6[/center]

50...Kg5!

Black saves a tempo over the variation with 50.h6! as the King takes the second kingside pawn in the g-file, a step closer to the action on the queenside.

51.Kb5 Kxh5 52.a4 Kxg6 53.a5 Kf6

The Black King cannot stop the a-pawn. The difference between winning and drawing comes from the King's ability to stop the c-pawn. Black will use the Bishop to stop the a-pawn and if White captures it somewhere along the a-file then the White King will have no time to stop Black's last pawn from running to g1.

54.a6

It's all very simple now.
If [font color="red"]54.c4 Ke5 55.c5[/font] then:

If [font color="red"]55...g5! 56.Kb6 g4 57.a6 Bd5[/font] then:

If [font color="red"]58.c6[/font] then Black wins after [font color="red"]58...Kd6 59.c7 Kd7.[/font]
If [font color="burgundy"]58.a7 Ba8 59.c6 Kd6 60.c7 Kd7[/font] White fails to queen while Black's pawn is too remote for White to do anything about it.

If [font color="darkred"]55...Bd5 56.c6 Kd6 57.a6 Bxc6+[/font] then:

If [font color="darkred"]58.Kb4[/font] then Black wins after [font color="darkred"]58...g5 59.Kc4 Ke5 60.Kd3 Kf4 61.Kd4 Bf3.[/font]
If [font color="magenta"]58.Kc4 g5[/font] then:

If [font color="magenta"]59.Kd3[/font] then Black wins after [font color="magenta"]59...g4 60.Ke2 g3! 61.Ke1 g2 62.Kf2 Ke5.[/font]
If [font color="darkorange"]59.Kd4[/font] then Black wins after [font color="darkorange"]59...g4 60.Ke3 g3 61.Ke2 g2.[/font]

54...Bd5 55.c4 Ba8 56.Kb6 Ke5 57.Kc7

[font color="red"]57.a7 g5 58.Kc7 g4 59.Kb8 Be4 60.c5 g3.[/font]

57...g5 58.Kb8 Be4 59.Kc7 g4 60.a7 g3 61.c5 Ba8 62.Kb8 Bc6 0-1

If [font color="red"]63.Kc7[/font] then Black wins after [font color="red"]63...Kd5 64.a8Q Bxa8 65.Kd7 g2[/font]
P-n Aronian resigns.

Jack Rabbit

(45,984 posts)

11. Nevermind . . .

Reply to Jack Rabbit (Reply #2)

Fri Apr 19, 2013, 11:03 PM

Apr 2013

Jack Rabbit

(45,984 posts)

5. World Women's Team Championship, Astana, Kazakhstan

Reply to Jack Rabbit (Reply #1)

Tue Apr 16, 2013, 12:42 AM

Apr 2013

[center][/center]

[center]Beyterk (World Tree in Kazakh Lore), Astana[/center][font size="1"]Photo by Amanante in Wikipedia (http://en.wikipedia.org/wiki/File:Bayterek1.jpg)
(Creative Commons License, Attribution/Share Alike)
[/font]

Jack Rabbit

(45,984 posts)

6. Kurtsidze (Georgia) - M. Muzychuk (Ukraine), Round 7 (Opening Theory; Indian QG/Calcutta Opening)

Reply to Jack Rabbit (Reply #5)

Tue Apr 16, 2013, 12:46 AM

Apr 2013

Last edited Tue Apr 16, 2013, 11:23 AM - Edit history (1)

Ukraine won the world women's team championship over China and Russia. As we've often said, team chess competitions are often won on the lower boards after the strongest palys battle to a draw. It is not surprising that all three of the medal winners got strong performances from boards three and four.

Mariya Muzychuk showed in Astana that she is a good player in own right and could soon step out from her big sister's shadow.

[center][/center]

[center]Mariya Muzychuk[/center][font size="1"]Photo by Stefan64 (http://commons.wikimedia.org/wiki/User:Stefan64) from Wikimedia Commons (http://commons.wikimedia.org/wiki/File:MMuzychuk10.jpg)
(Creative Commons License, Attribution/Share Alike)
[/font]
Nino Khurtsidze (Georgia) - Mariya Muzychuk (Ukraine)
Women's World Team Championship, Round 7/Board 3
Astana, 10 March 2013

West Indian Game: Indian Queen's Gambit (Calcutta Opening/Makogonov Variation) (Grünfeld Defense)

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3

This isn't an uncommon variation of the Indian Queen's Gambit, better known as the Grunfeld Defense, but still less common than either the Exchange Opening (see Zhukova-Cmilyte, Russian ChT, Dagomys, 2010) or the Russian Opening (see Pashikian-Kurnosov, Aeroflot Op, Moscow, 2009).
We will dub this position the Calcutta Opening, since it was first played in the Calcutta Chess Club in a game between the British master John Cochrane and the Brahmin chess player Mahesh Chandra Bannerjee that it arose is 1855.

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (Calcutta Opening)[/center][center]Position after 5.e3[/center]

5...0-0 6.b4

The text is the Makagonov Variation.
[font color="red"](Main Line)[/font] If [font color="red"]6.Be2[/font]

[font color="red"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (Calcutta Opening/Main Line)[/center][center]Position after 6.Be2[/center]
[/font]

If [font color="red"]6...c6 7.0-0[/font] then:

If [font color="red"]7...dxc4 8.Bxc4 Bg4 9.h3 Bxf3 10.Qxf3 Nbd7[/font] then:

If [font color="red"]11.Rd1[/font] then:

If [font color="red"]11...e5 12.d5 e4[/font] then:

If [font color="red"]13.Nxe4 Nxe4 14.Qxe4 Nb6 15.Bb3 cxd5 16.Bxd5[/font] then:

If [font color="red"]16...Re8 17.Qf3 Nxd5 18.Rxd5[/font] then:

If [font color="red"]18...Qc7 19.e4[/font] then:

[font color="red"]19...Qe7 20.Be3 Qxe4 21.Qxe4 Rxe4 22.Rad1 Bxb2 23.Rb5[/font] gives White a slight advantage; the Black Bishop must retreat, leaving the Rook to win back the pawn at b7 (Zhou Weiqi-Paragua, Asian Ch, Mashhad, 2011).
[font color="burgundy"]19...Qc4 20.Rd7 Rxe4 21.Be3 Bxb2 22.Rb1 Qe6 23.Rxb7[/font] gives White a clear advantage (R. Kaufman-Filipovich, Foxwoods Open, Mashantucket, 2008).

If [font color="darkred"]a) 18...Qe7 19.Rb1 Rac8[/font] then:

[font color="darkred"]20.b3 Rc2 21.a4 Bc3 22.Qd1 Qe4 23.Rd8 Rxd8 24.Qxd8+[/font] gives White an extra pawn (Marin-G. Flear, ITZ, Szirak, 1987).
[font color="magenta"]20.Bd2 Rc2 21.a4 Bxb2 22.e4 Be5 23.Qb3[/font] is equal (Muresan-Semenova, Candidates' W ¼-final Rd 5, Bad Kissingen, 1983).

If [font color="darkred"]b) 18...Qf6 19.Qxf6 Bxf6 20.Bd2[/font] then:

[font color="darkred"]20...Rac8 21.Bc3 Bxc3 22.bxc3 Rxc3 23.Rd7 Rb8[/font] is equal (Muresan-Semenova, Candidates' W ¼-final Rd 7, Bad Kissingen, 1983).
[font color="magenta"]20...Rad8 21.Rxd8 Rxd8 22.Bc3 Bxc3 23.bxc3 b6 24.a4[/font] is equal.

If [font color="darkred"]16...Nxd5 17.Rxd5[/font] then:

If [font color="darkred"]17...Qb6 18.Qd3[/font] then:

If [font color="darkred"]18...Rad8 19.e4 Bd4[/font] then:

[font color="darkred"]20.Kh1 Bxf2 21.Bh6 Rxd5 22.exd5 Rd8 23.Rd1[/font] is equal (Bareev-Kramnik, IT, Novgorod, 1994).
[font color="purple"]20.Bh6 Qxb2 21.Rd1 Rxd5 22.exd5 Qxf2+ 23.Kh1 Bg7[/font] is equal (Shirov-Bareev, IT, León, 1995).

[font color="darkorange"]18...Rfe8!? 19.Rb1 Rad8 20.Bd2 Rxd5 21.Qxd5 Rd8 22.Qa5[/font] gives White a small advantage in space (Gelfand-Wang Yue, Grand Prix, Ashtrakhan, 2010).

[font color="magenta"]17...Qc7 18.Qd3 Rad8 19.e4 Rxd5 20.exd5 Qe5 21.Be3[/font] gives White a small advantage in space and a passed pawn; Black is eying the pawn at b2 (Karavade-Sultana, Asian Games TT, Guangzhou, 2010).

If [font color="darkred"]a) 13.Qf4[/font] then:

If [font color="darkred"]13...Qe7 14.dxc6 bxc6[/font] then:

If [font color="darkred"]15.Bd2 Nb6 16.Bb3[/font] then:

[font color="darkred"]16...a5 17.Rab1 a4 18.Bc2 Rfe8 19.Be1 a3 20.bxa3[/font] gives White a minute advantage with a slightly better center [i[(Razuvaev-Lukov, Op, Geneva, 1993).
If [font color="magenta"]16...c5!?[/font] then:

If [font color="magenta"]17.Be1! Rab8 18.Rab1[/font] then:

If [font color="magenta"]18...Rfe8 19.Qd6 Nfd7[/font] then:

[font color="magenta"]20.Qxe7!? Rxe7! 21.a4 c4 22.Ba2 Nc5 23.a5[/font] assures White of winning the c-pawn (Portisch-Drasko, IT, Sarajevo, 1986).
[font color="hotpink"]20.Ba4 Qxd6 21.Rxd6 Bxc3 22.Bxd7 Be5 23.Bxe8 Bxd6 24.Bc6[/font] leaves White slightly better.

[font color="purple"]18...Qb7 19.a4 Rbd8 20.a5 Nc8 21.Ba2 Qc6 22.Bc4[/font] gives White stronger pawns, the Bishop pair and more space.

Also good is [font color="darkorange"]17.Rac1! Rab8 18.Be1 Rfd8 19.Rxd8+ Rxd8 20.Bc2[/font] when is also White slightly better.

[font color="#D0A020"]15.Qc7 Rfc8 16.Qa5 Ne5 17.Be2 Rd8 18.Rxd8+ Rxd8[/font] is equal (D. Gurevich-J. Donaldson, Op, Las Vegas, 2005).

If [font color="magenta"]13...cxd5 14.Nxd5[/font] then:

[font color="magenta"]14...Nb6 15.Nc3 Qe7 16.Bb3 Rfd8 17.Bd2 Rd7 18.Be1[/font] gives White a slight edge (D. Gurevich-Ziane, Op, Dallas, 1996).
[font color="darkorange"]14...Nxd5 15.Bxd5 Nc5 16.Rb1 Qe7 17.Bd2 Be5 18.Qg4[/font] gives White a slight advantage (Schroll-Soylu, Euro ChT, Pula, 1997).

[font color="burgundy"]b) 13.Qe2 c5 14.Bd2 Qe7 15.Be1 Ne8 16.Bb5 Nd6[/font] is equal (Muresan-Semenova, Candidates' W ¼-final Rd 1, Bad Kissingen, 1983).

[font color="#darkorange"]11...Nb6 12.Bb3 a5 13.a3 a4 14.Ba2 Ne8 15.e4[/font] gives White the advantage in space in the center, while has more space on the queenside (S. Zhigalko-Issakainen, Euro Club Cup, Rogaska Slatina, 2011).

If [font color="darkred"]11.e4 e5 12.d5[/font] then:

[font color="darkred"]12...Nb6 13.Bb3 cxd5 14.Nxd5 Nbxd5 15.Rd1 Qe7 16.exd5[/font] is equal (El Gindy-Wageih, Egyptian Championship, Cairo, 2009).
[font color="magenta"]12...Rc8 13.dxc6 Rxc6 14.Bb5 Rd6 15.Be3 a6 16.Bc4[/font] gives Black more space and Black command of an open file (Radjabov-Gagunashvili, World Blitz Ch, Rishon Le Zion, Israel, 2006).

If [font color="darkred"]a) 7...a6[/font] then:

If [font color="darkred"]8.a4 a5 9.Qb3 e6 10.Bd2[/font] then:

[font color="darkred"]10...b6 11.Rfc1 Nbd7 12.Be1 Bb7 13.Qa3[/font] is equal (Leko-Wang Hao, Mind Games Blitz, Beijing, 2012).
If [font color="magenta"]10...Ne4 11.Be1 Nd6 12.c5[/font] then:

If [font color="magenta"]12...Nf5 13.Rd1 Nd7 14.e4 Ne7 15.Bd2[/font] then:

[font color="magenta"]15...b6 16.cxb6 Qxb6 17.Qxb6 Nxb6[/font] is equal (Sargissian-N. Pert, Euro ChT, Sithonia, Greece, 2012 and Irturrizaga Bonelli-Kamsky, Aeroflot Op, Moscow, 2011).
[font color="purple"]15...Nf6!? 16.Bd3! dxe4 17.Nxe4 Nxe4 18.Bxe4 Nd5 19.Ne5[/font] gives White a small adantage in space (Rakhmanov-Prasca Sosa, Op, Guarenas, Venezuela, 2012).

[font color="darkorange"]12...Ne8 13.Rc1 Nd7 14.e4 Nc7 15.Rd1 Rb8 16.Bd2[/font] is equal.

If [font color="magenta"]a1) 8.h3 dxc4 9.Bxc4 b5[/font] then:

If [font color="magenta"]10.Bd3 c5 11.dxc5[/font] then:

If [font color="magenta"]11...Nbd7[/font] then:

[font color="magenta"]12.b4 Nd5 13.Nxd5 Bxa1 14.Be4 Ra7 15.Nd4[/font] gives White the initiative and more space (Zenyuk-Reshef, Canadian Op, Toronto, 2011).
[font color="burgundy"]12.c6 Nc5 13.Bc2 Qb6 14.Bd2 Qxc6 15.Rc1 Bb7[/font] gives Black a slight advantage in space (Swapnil-Gupta, Op, Dubai, 2011).

If [font color="darkorange"]11...Nfd7[/font] then:

[font color="darkorange"]12.Ne4 Qc7 13.a4 Nxc5 14.Nxc5 Qxc5 15.axb5[/font] gives White a small advantage (Mozharov-Maletin, Russian ChT, Sochi, 2012).
[font color="purple"]12.Be4 Ra7 13.Nd4 Nxc5 14.Bf3 Rd7 15.Qe2 Rd6[/font] gives Black a small advantage in space(Zude-Kamsky, Rpd Op, Mainz, 2009).

If [font color="darkorange"]10.Bb3 Nbd7[/font] then:

[font color="darkorange"]11.e4 11...b4 12.e5 bxc3 13.exf6 cxb2 14.Bxb2 Bxf6[/font] is agreed drawn (Ehlvest-Privman, Marshall CC Ch, New York, 2003).
[font color="purple"]11.a4 b4 12.Ne2 c5 13.a5 Bb7 14.d5 Ne4[/font] gives Black a small advantage in space (Morozevich-Kamsky, Tal Mem Blitz, Moscow, 2007).

If [font color="magenta"]a2) 8.Bd2 dxc4 9.Bxc4[/font] then:

If [font color="magenta"]9...Bg4 10.h3 Bxf3 11.Qxf3 Nbd7[/font] then:

If [font color="magenta"]12.Rfd1 e5 13.Bb3 Qe7[/font] then:

If [font color="magenta"]14.Rac1 Rfe8 15.Na4[/font] then:

[font color="magenta"]15...exd4 16.exd4 Qe4 17.Qxe4 Nxe4 18.Ba5 Rac8 19.Rc2[/font] is equal (Tomashevsky-Bu Xiangzhi, Russian ChT, Dagomys, 2008).
[font color="burgundy"]15...b5 16.Nc3 Rac8 17.Ne4 exd4 18.Nxf6+ Qxf6 19.Qxf6 Bxf6 20.exd4[/font] draw (Tomashevsky-Bu Xiangzhi, TM, Ningbo, 2008).

[font color="#D0A020"]14.dxe5 Nxe5 15.Qe2 Ned7 16.Be1 Rad8 17.Bc2 Nb6[/font] is equal (Timman-Bu Xiangzhi, IT, Antwerp, 2008).

If [font color="darkorange"]12.Rad1 e5 13.Bb3 Qe7[/font] then:

[font color="darkorange"]14.a3 Rad8 15.Na4 exd4 16.exd4 Qe4 17.Qxe4 Nxe4 18.Ba5 Rc8[/font] draw (Yakovich-Panarin, Russian Ch HL, Krasnoyarsk, 2007).
[font color="purple"]14.dxe5 Nxe5 15.Qe2 Rad8 16.Bc1 Ned7 17.Bc2 Nc5[/font] is equal (Moradiabadi-Wang Yue, Asian Games, Doha, 2006).

If [font color="darkorange"]9...Nbd7 10.a4 c5 11.d5[/font] then:

[font color="darkorange"]11...Nb6 12.Qb3 Bg4 13.Ne5 Bf5 14.Rfd1 Ne8 15.f4[/font] is equal (Jumabayev-Fressinet, World Cup, Khanty-Mansiysk, 2011).
[font color="purple"]11...Ne8 12.e4 Nd6 13.Bd3 Rb8 14.Qe2 f6 15.Rab1[/font] gives White the advantage in space (Krasenkow-Zhong Zhang, IT, Shenyang, 1999).

If [font color="darkred"]b) 7...Bg4 8.cxd5[/font] then:

If [font color="darkred"]8...cxd5 9.Qb3 b6 10.h3[/font] then:

If [font color="darkred"]10...Bxf3 11.Bxf3 e6 12.Bd2 Nc6[/font] then:

If [font color="darkred"]13.Qa4[/font] then:

If [font color="darkred"]13...Na5 14.b3 a6 15.Ne2[/font] then:

If [font color="darkred"]15...Nb7 16.Qc6 Ra7[/font] then:

[font color="darkred"]17.Rfc1 17...Re8 18.Qc7 Bf8 19.Rc6 Qxc7 20.Rxc7 Rb8[/font] is equal (Karpov-Jussupow, Alekhine Mem, Moscow, 1992).
[font color="burgundy"]17.Rac1 Re8 18.Nf4 Nd6 19.Nd3 Nb5 20.Qc2 Rc7[/font] is equal (Speelman-H. J. Plaskett, IT 8687, Hastings, 1986).

If [font color="magenta"]15...Qd7 16.Qxd7 Nxd7[/font] then:

If [font color="magenta"]17.Rac1 Rac8[/font] then:

If [font color="magenta"]18.e4 Nf6 19.exd5 Nxd5 20.Bxd5 exd5 21.Nc3[/font] gives White a small initiative (Vyzmanavin-Smyslov, IT, Gelsenkirchen, Germany, 1991).
[font color="purple"]18.Rxc8[/font] draw (Darga-Meduna, Bundesliga 8990, Germany, 1989).

[font color="darkorange"]17.Rfc1 Rfc8 18. Nf4 Nf6 19. Be2 g5 20. Nd3[/font] is equal (Sargissian-Stellwagen, IT, Paks, Hungary, 2008).

[font color="darkpink"]13...Qd7 14.Rfc1 Na5 15.b3 Rfc8 16.Qxd7 Nxd7 17.Be2[/font] gives White a small advantage in space (Shulman-Tuhrim, Op, Philadelphia, 2012).

If [font color="magenta"]13.Be2 a6[/font] then:

If [font color="magenta"]14.Rfc1 Na5 15.Qb4 Nd7[/font] then:

[font color="magenta"]16.b3 Re8 17.Na4 Nb7 18.Qc3 b5 19.Qc7 Rb8[/font] is equal (Stohl-Haba, ZT, Budapest, 1993).
[font color="purple"]16.Na4 Nb7 17.Rc6 b5 18.Rac1 Re8 19.Rc7 Rb8[/font] is equal (Timman-Smyslov, IT, Las Palmas, 1982).

[font color="darkorange"]14.Rac1 Na5 15.Qb4 Nd7 16.b3 Re8 17.Nb1[/font] is equal (Piket-J. Schmitz, Bundesliga 9899, Germany, 1999).

If [font color="magenta"]10...Bc8 11.Bd2 Nc6 12.Ne5 Bb7 13.Nxc6 Bxc6 14.Rfc1[/font] then:

If [font color="magenta"]14...Qd7 15.a4 Rfc8[/font] then:

If [font color="magenta"]16.Rc2 e6 17.Rac1 Bf8[/font] then:

[font color="magenta"]18.Ba6 Bb7 19.Qb5 Qxb5 20.axb5 Rcb8 21.Na2[/font] gives White a small advantage in space (Grachev-Vysochin, Chigorin Mem Op, St Petersburg, 2010).
[font color="burgundy"]18.Bb5 Ne8 19.Bxc6 Rxc6 20.Nb1 Rac8 21.Qd3 Nd6[/font] is equal (Lauber-C. Balogh, Bundesliga 0809, Baden-Baden, 2008).

[font color="#D0A020"]16.a5 bxa5 17.Rxa5 e6 18.Rca1 Bf8 19.Qa2 Rcb8[/font] is equal (Anand-Gashimov, IT, Nanjing, 2010).

If [font color="darkorange"]14...e5?![/font] (the pawn sacfice is dubious) [font color="darkorange"]15.dxe5! Nd7[/font] then:

[font color="darkorange"]16.Nb5?! Nc5! 17.Qd1 Bxe5 18.Bc3 Bxc3 19.Rxc3[/font] gives White a slight edge (Khairallah-Mucongoma, Ol, Dresden, 2008).
[font color="purple"]16.f4 Nc5 17.Qa3 Qd7 18.Bf3 f6 19.b4[/font] continues to give White an extra pawn.

If [font color="magenta"]8...Nxd5 9.h3 Bxf3 10.Bxf3[/font] then:

If [font color="magenta"]10...e6[/font] then:

If [font color="magenta"]11.Bd2 Nd7[/font] then:

If [font color="magenta"]12.Rc1 Re8[/font] then:

[font color="magenta"]13.Qc2 Nxc3 14.Bxc3 Nb6 15.Rfd1 Qe7 16.Qb3[/font] is equal (Toth-Morky, IT 8485, Reggio Emilia, 1984).
[font color="burgundy"]13.Ne2 N5f6 14.g3 e5 15.Qc2 Qe7 16.dxe5 Nxe5[/font] is equal (Portisch-Rubinetti, ITZ, Toluca, 1982).

If [font color="darkorange"]12.Qc2 Rc8 13.Rfd1[/font] then:

If [font color="darkorange"]13...Qe7!?[/font] then:

If [font color="darkorange"]14.Qb3!?[/font] then:

[font color="darkorange"]14...b6?! 15.Nxd5! exd5 16.Bb4 c5 17.Ba3[/font] wins a pawn for White (Jovanic-Marechal, Op, Cappelle-la-Grande, 2013).
[font color="purple"]14...Nxc3 15.Bxc3 Rc7 16.Rac1 Rb8 17.Bb4 c5 18.Qa4[/font] gives White only a small advantage.

If [font color="#D0A020"]14.Nxd5! cxd5 15.Qb3 Rfe8 16.Qxb7[/font] then:

[font color="#D0A020"]16...Ne5 17.Bxd5 exd5 18.Qxe7 Rxe7 19.dxe5 Bxe5 20.Bb4[/font] gives White an extra pawn.
[font color="burgundy"]16...a5 17.b3 Rb8 18.Qc7 a4 19.Rdc1 axb3 20.axb3[/font] gives White an extra pawn.

[font color="hotpink"]13...Nxc3 14.Bxc3 Re8 15.Bb4 Ra8 16.Bd6 Nb6 17.Bg3[/font] gives White a very slight edge.

If [font color="darkorange"]11.e4 Nb6 12.e5 N8d7 13.Ne4[/font] then:

[font color="darkorange"]13...Qc7 14.Bg5 f5 15.exf6 Nxf6 16.Nc5 Rae8 17.Re1[/font] gives White a lasting initiative against Black' weak e-pawn (Rowson-Motwani, Scottish Ch, Edinburgh, 1999).
[font color="purple"]13...h6 14.Bd2 Nd5 15.Qc1 Kh7 16.b4 Qb6 17.Qc4[/font] gives White a slight advantage in space (O. Foisor-Kitchlew, Op, Gibraltar, 2008).

If [font color="darkorange"]10...Nb6[/font] then:

If [font color="darkorange"]11.b3[/font] then:

If [font color="darkorange"]11...e5 12.Ba3 Re8 13.dxe5 N8d7 14.Qc2[/font] then:

If [font color="darkorange"]14...Nxe5 15.Be2 Qh4 16.Rad1[/font] then:

[font color="darkorange"]16...Ned7 17.Rd2 Nf8 18.Rfd1 Rad8 19.Rxd8 Rxd8 20.Ne4[/font] is equal (Korchnoi-Sakharov, Soviet Ch ½-final, Tbilisi, 1956).
[font color="burgundy"]16...f5!? 17.f4! Nf7 18.e4 Rad8 19.e5 Rxd1 20.Qxd1[/font] gives White a slight advantage in space (Vladimirov-Beliavsky, Leningrad CC Ch, 1967).

[font color="#D0A020"]14...Bxe5!? 15.Rfd1 Bg7 16.Rac1 Bf8 17.Bb2 Qe7 18.Ne4[/font] gives White a slight advantage in space.

[font color="hotpink"]11...Nd5 12.Ne2 Nd7 13.Bb2 Qb6 14.Qc2 Rfe8 15.Rad1[/font] is equal (Navara-Sanchez, French ChT, Belfort, 2012).

[font color="purple"]11.Qc2 e5 12.dxe5 Bxe5 13.Rd1 Qe7 14.b3 Na6[/font] is equal (Kasimdzhanov-Meenakshi, Commonwealth Ch, Mumbai, 2003).

If [font color="blue"]6.Qb3 c6 7.Bd2[/font] then:

[font color="blue"](Botvinnik Variation)[/font] If [font color="blue"]7...e6[/font]

[font color="blue"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (Calcutta Opening/Botvinnik Variation)[/center][center]Position after 7...e6[/center]
[/font]

If [font color="blue"]8.Bd3 Nbd7 9.0-0[/font] then:

If [font color="blue"]9...b6 10.cxd5 exd5 11.e4[/font] then:

If [font color="blue"]11...dxe4 12.Nxe4[/font] then:

If [font color="blue"]12...c5 13.Nxf6+[/font] then:

If [font color="blue"]13...Nxf6 14.dxc5 bxc5[/font] then:

[font color="blue"]15.Bc4 Qc7 16.Rfe1 Rb8 17.Qa4 Rxb2 18.Ba5 Qd7[/font] is equal and soon agreed drawn (Rogozenko-Dr. Hübner, Bundesliga 9899, Germany, 1999).
[font color="#0080C0"]15.Rfd1 Be6 16.Qa3 Nd5 17.Qxc5 Bxb2 18.Rab1[/font] gives White a slight edge in space (Fine-Mikenas, IT. Kemeri, 1937).

[font color="#20B0E0"]13...Qxf6 14.Bg5 Qd6 15.Rfe1 Nf6 16.dxc5 Qxc5 17.Bc4[/font] gives White a fair advantage in space (Richter-Sajtar, IT, Chocen, 1942).

If [font color="darkblue"]12...Nxe4 13.Bxe4 Bb7 14.Rac1[/font] then:

[font color="darkblue"]14...Rc8 15.Qa4 a6 16.Bg5 Qc7 17.b4 Rfe8 18.Qc2[/font] gives White more space and Black stronger pawn (Sertic-Zufic, Op, Zagreb, 2012).
[font color="dodgerblue"]14...Qf6 15.Qa4 Rfc8 16.Rfe1 Bf8 17.a3 a5 18.Ne5[/font] gives White a slight advantage in space (Taimanov-Kholmov, Soviet Ch, Moscow, 1949).

If [font color="darkblue"]11...c5 12.Nxd5 cxd4 13.Nxf6+ Bxf6[/font] then:

[font color="darkblue"]14.Qd5 Bb7 15.Qxb7 Nc5 16.Qc6 Nxd3 17.Qc4[/font] is equal (V. Georgiev-Welling, Op, Cappelle-la-Grande, 1999).
[font color="dodgerblue"]14.Bb4 Nc5 15.Qc2 Be7 16.Bd2 Qd6 17.Bh6 Rd8[/font] is equal (Chekhover-Belavenets, Soviet Ch, Tbilisi, 1937).

If [font color="darkblue"]9...Nb6[/font] then:

If [font color="darkblue"]10.Rfd1 dxc4 11.Bxc4 Nxc4 12.Qxc4[/font] then:

If [font color="darkblue"]12...Nd7 13.e4[/font] then:

[font color="darkblue"]13...e5 14.Bg5 Qe8 15.d5[/font] gives White a small advantage in space (Stern-Gustafsson, German Ch, Bonn, 2011).
[font color="#0080C0"]13...Qc7 14.e5 Nb6 15.Qe2 f5 16.exf6 Rxf6 17.Ne4[/font] gives White an extra pawn and the advantage in space (Fine-Lilienthal, IT, Moscow, 1937)

[font color="steelblue"]12...Re8 13.e4 b5 14.Qb3 Nd7 15.Be3 a6 16.d5[/font] is equal (Lilienthal-Grob, Ol, Warsaw, 1935).

If [font color="dodgerblue"]10.Rac1 dxc4 11.Bxc4 Nxc4 12.Qxc4[/font] then:

[font color="dodgerblue"]12...Nd7 13.Ne4 Nf6 14.Nxf6+ Bxf6 15.e4 Bd7 16.Bb4[/font] gives White the initiative and more space (Hölzl-al Audario, Ol, Novi Sad, 1990).
[font color="darkcyan"]12...Nd5 13.Ne4 f5 14.Nc5 b6 15.Nd3 Bb7 16.Nfe5[/font] gives White a small advantage in space (Stepanov-Lilienthal, Trade Unions Ch, Moscow, 1937).

[font color="darkblue"](Pachman Variation)[/font] If [font color="darkblue"]7...dxc4[/font]

[font color="darkblue"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (Calcutta Opening/Pachman Variation)[/center][center]Position after 7...dc4:p[/center]
[/font]

If [font color="darkblue"]8.Bxc4[/font] then:

If [font color="darkblue"]8...Nbd7[/font] then:

If [font color="darkblue"]9.Ng5 Qe8 10.0-0[/font] then:

[font color="darkblue"]10...h6 11.Nge4 Nxe4 12.Nxe4 Nb6 13.Bd3 Nd5 14.Nc3[/font] gives White a slight advantage in space (Reti-Spielmann, IT, Berlin, 1928).
If [font color="dodgerblue"]10...Nb6 11.Bd3 e5 12.Nce4[/font] then:

[font color="dodgerblue"]12...Nfd5 13.a4 a5 14.Nd6 Qe7 15.Nxc8 Nxc8 16.e4[/font] draw (Suba-Csom, ZT, Prague, 1985).
[font color="darkcyan"]12...Nxe4 13.Nxe4 Be6 14.Qc2 Qe7 15.dxe5 Bxe5[/font] is equal.

If [font color="dodgerblue"]9.0-0 Nb6 10.Be2 Be6 11.Qc2[/font] then:

[font color="dodgerblue"]11...Rc8 12.Rfd1 Qc7 13.e4 Bc4 14.Bg5 Bxe2 15.Qxe2[/font] gives White a small advantage in space (Benjamin-Dlugy, Blitz Op, 1988).
If [font color="darkcyan"]11...Bc4 12.e4[/font] then:

If [font color="darkcyan"]12...Re8 13.Rad1[/font] then:

If [font color="darkcyan"]13...e5? 14.Nxe5![/font] then:

If [font color="darkcyan"]14...Qxd4 15.Nxc4 Nxc4 16.Bg5[/font] then:

[font color="darkcyan"]16...Qc5 17.Bxf6 Bxf6 18.Nb1 Bxb2 19.Bxc4 Qe5 20.Rd7[/font] Black resigns (Reshevsky-Santasiere, IT, Syracuse, New York, 1934).
[font color="#0080C0"]16...Qe5[/font] drops a piece to [font color="#0080C0"]17.Bxf6 Bxf6 18.Bxc4.[/font]

[font color="steelblue"]14...Bxa2 15.Nxa2 Qxd4 16.Nxf7 Kxf7 17.Qb3+ Re6 18.Nc3[/font] leaves White in domination of the board.

[font color="seagreen"]13...Qc7 14.h3 Red8 15.b3 Bxe2 16.Nxe2[/font] gives White a small advantage in space.

[font color="slateblue"]12...Bxe2 13.Nxe2 Nbd7 14.Rad1 Qc7 15.Bf4 e5 16.Bg3[/font] gives White a small advantage in space (Popchev-Bernasek, Op, Brno, 2012).

If [font color="dodgerblue"]8...b5 9.Be2 a5 10.0-0[/font] then:

[font color="dodgerblue"]10...Bf5 11.Rfc1 Nbd7 12.Be1 Ne4 13.Nxe4 Bxe4 14.Nd2[/font] gives White a slight advantage in space (Burmakin-Khakimov, IT, Kharkov, 2005).
[font color="darkcyan"]10...Ba6 11.Rfe1 Nbd7 12.Rac1 Qb8 13.Nb1 a4 14.Qc2[/font] gives White a slight edge with a better center; Black is staking his hopes on the queenside (Vistaneckis-Nei, IT, Palanga, 1961).

[font color="#008000"](Paris Variation)[/font] If [font color="#008000"]6.Bd3[/font]

[font color="#008000"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (Calcutta Opening/Paris Variation)[/center][center]Position after 6.Bf1d3[/center]
[/font]

If [font color="#008000"]6...c6 7.0-0[/font] then:

If [font color="#008000"]7...Bg4 8.h3 Bxf3 9.Qxf3[/font] then:

If [font color="#008000"]9...e6 10.Rd1 Nbd7[/font] then:

If [font color="#008000"]11.b3 Re8 12.Bb2 Qe7[/font] then:

If [font color="#008000"]13.Qe2[/font] then:

If [font color="#008000"]13...Rad8[/font] then:

[font color="#008000"]14.a4 Qd6 15.Ba3 Qb8 16.Rac1 Bf8 17.Bxf8 Kxf8[/font] is equal (Bets-Privakov, IT, Marganets, Ukraine, 1999).
[font color="#808000"]14.Qc2 e5 15.dxe5 Nxe5 16.cxd5 Nxd5 17.Nxd5 Rxd5[/font is equal (Roiz-Ni Hua, IT, Saratov, 2011).

[font color="#00C080"]13...dxc4 14.Bxc4 Nd5 15.Rac1 Nxc3 16.Bxc3 Nb6 17.Bd3[/font] is equalm (Serper-Bertholee, Op, Amsterdam, 1990).

If [font color="#40D040"]13.Bf1 a6[/font] then:

If [font color="#40D040"]14.Rac1[/font] then:

If [font color="#40D040"]14...Rac8[/font] then:

[font color="#40D040"]15.Rc2 e5 16.cxd5 e4 17.Qe2 Nxd5 18.Nxd5 cxd5[/font] is equal ().(S. Volkov-Shimanov, Russian Ch HL, Ulan Ude, 2009).
[font color="seagreen"]15.a3 e5 16.cxd5 e4 17.Qe2 cxd5 18.Rc2 Rc6[/font] is equal (M. Bensdorp-Stetsko, OlW, Khanty-Mansiysk, 2010).

[font color="#6CC417"]14...Rad8 15.Qe2 h5 16.Qc2 Nb6 17.Bd3 Nc8 18.Nb1[/font] is equal (Korchnoi-Petrosian, Candidates' ¼-final Match, Velden, 1980).

[font color="forestgreen"]14.Qe2 Rac8 15.Rac1 Nh5 16.g4 Nhf6 17.Bg2 Red8[/font] is equal (Bauer-Kallai, French ChT, Metz, 2009).

If [font color="#40D040"]a) 11.Qe2 Re8 12.Qc2 a6[/font] then:

[font color="#40D040"]13.e4 dxe4 14.Nxe4 Nxe4 15.Bxe4 Qh4 16.Be3 f5[/font] is equal (Ioseliani-Smyslov, Match, Roquebrune, 1998).
[font color="forestgreen"]13.b3 Rc8 14.Bb2 h5 15.Rac1 Qe7 16.Qb1 h4[/font] is equal (Sasikiran-Bu Xiangzhi, Asian Games Rpd, Guangzhou, 2010).

If [font color="#40D040"]b) 11.Bd2 Re8 12.Be1[/font] then:

If [font color="#40D040"]12...Qe7 13.Qe2 a6 14.Rac1[/font] then:

If [font color="#40D040"]14...Rac8 15.a3[/font] then:

[font color="#40D040"]15...e5 16.cxd5 cxd5 17.Bb1 b5 18.a4 b4[/font] gives Black a slight advantage in space (Delemarre-E. L'Ami, Dutch Ch, Leeuwarden, 2003).
[font color="#808000"]15...h5 16.b4 Bf8 17.f4 Nh7 18.g4 hxg4 19.hxg4[/font] is equal (Zhou Weiqi-Wang Yue, IT, Danzhou, 2012)

If [font color="forestgreen"]14...Rad8 15.Qc2[/font] then:

[font color="forestgreen"]15...Qd6 16.Bf1 Qb8 17.Qb1 Nb6 18.b3 Nc8 19.Bd3[/font] is equal (Karpov-Seirawan, Match Rd 1, St Louis, 2012).
If [font color="#6CC417"]15...dxc4 16.Bxc4[/font] then:

[font color="#6CC417"]16...e5 17.dxe5 Nxe5 18.Be2 Rxd1 19.Rxd1[/font] is equal (Shipov-Gretarsson, Op, Groningen, 1993).
[font color="seagreen"]16...Nb6 17.Ne2 Rd7 18.Ba5 Nxc4 19.Qxc4[/font] is equal.

If [font color="forestgreen"]12...Nb6 13.b3[/font] then:

[font color="forestgreen"]13...Qe7 14.Qe2 e5 15.dxe5 Qxe5 16.cxd5 Nbxd5 17.Rac1[/font] is equal (Panchenko-M. Petursson, Anibal Op, Linares, 1995).
[font color="#6CC417"]13...Nc8 14.Qe2 Nd7 15.b4 a6 16.a4 Nd6[/font] is equal (Karpov-Seirawan, Match Rd 3, St Louis, 2012).

[font color="#808000"]9...dxc4 10.Bxc4 Nbd7 11.Rd1 e5 12.d5[/font] transposes into the [font color="red"]main line.[/font]

If [font color="#40D040"]7...Nbd7 8.cxd5 cxd5 9.Qb3[/font] then:

[font color="#40D040"]9...e6 10.Bd2[/font] then:

[font color="#40D040"]10...a6 11.Rfc1 b6[/font] then:

If [font color="#40D040"]12.a4[/font] then:

If [font color="#40D040"]12...Re8 13.Na2[/font] then:

[font color="#40D040"]13...Ne4 14.Be1 Bb7 15.Nb4 e5 16.Nc6 Bxc6 17.Rxc6[/font] is equal (E. Torre-Escobar Forero, Ol, Torino, 2006).
[font color="#808000"]13...Nb8 14.Rc2 Bb7 15.Rac1 Nfd7 16.Rc7 Ra7 17.a5[/font] gives White a small advantage in space and an annoying Rook at c7; Black is cramped (Giustolisi-Fairhurst, ZT, Dublin, 1957).

If [font color="forestgreen"]12...Bb7 13.Na2 a5[/font] then:

[font color="forestgreen"]14.Rc2 Qb8 15.Rac1 Rc8 16.Nc3 Bf8 17.h3[/font] gives White a slight advantage in space (Mikhalevsky-Varley, Op, Caerleon, Wales, 2005).
[font color="#6CC417"]14.Nc3 Rc8 15.Nb5 Rxc1+ 16.Rxc1 Qb8 17.Rc7 Rc8[/font] is equal (Kunte-Palit, Indian Ch, Mumbai, 2009).

If [font color="forestgreen"]12.Na4[/font] then:

If [font color="forestgreen"]12...Ne4 13.Bb4 Re8[/font] then:

[font color="forestgreen"]14.Qc2 Bb7 15.Qc7 Rb8 16.Qxd8 Rexd8 17.Rc7[/font] gives White a small advantage in space (Veresov-Petrov, Soviet Ch, Leningrad, 1940).
[font color="#6CC417"]14.Bxe4 dxe4 15.Nd2 Bb7 16.Bd6 b5 17.Nc3[/font] gives White a small advantage in space.

[font color="#00C080"]12...b5!? 13.Nc5! Nxc5 14.dxc5 Ne4 15.Be1 f5 16.a4[/font] gives White a passed pawn and more space; Black cannot hold the extra pawn (Lanzicka-Papadakis, Euro Ch, Rijeka, 2010).

If [font color="forestgreen"]10...Nb8[/font] then:

[font color="forestgreen"]11.Rfc1 Nc6 12.Na4 Ne4 13.Be1 f5 14.Nc5[/font] gives White a small advantage in space (Andric-Milic, IT, Belgrade, 1948).
[font color="#6CC417"]11.Ne5 Ne8 12.f4 f6 13.Nf3 Nd6 14.Nb5[/font] gives White a slight advantage in space (Shkuta-Maliszewski, Kiev Ch, 1999).

If [font color="forestgreen"]9...Nb6 10.a4 Bf5 11.Be2[/font] then:

[font color="forestgreen"]11...a5 12.Bd2 Rc8 13.Rfc1 Bg4 14.Nb5 Nc4 15.Be1[/font] gives White a small advantage in space(Higinio Villegas-Graf Stevenson, La Plata, 1944).
[font color="#6CC417"]11...Rc8!? 12.Ne5 Ne4 13.a5 Nxc3 14.bxc3 Nd7 15.Nxd7 Qxd7[/font] is equal (Rustemov-Romsdal, Politiken Cup, Copenhagen, 2001).

[font color="#D4A017"](Opocensky Variation)[/font] If [font color="#D4A017"]6.Bd2 c6[/font] then:

If [font color="#D4A017"]7.Rc1 Ne4[/font] then:

If [font color="#D4A017"]8.cxd5 Nxd2 9.Qxd2 cxd5 10.Be2 Nc6 11.0-0 e6[/font] then:

[font color="#D4A017"]12.Ne1 Bd7 13.Nd3 b6 14.Rc2 Qe7 15.b3 Rfc8[/font] is equal (Bouaziz-Ivanchuk, IT, Lucerne, 1989).
(font color="#C7A317"]12.Rfe1 Qe7 13.Na4 Rd8 14.Bb5 Bd7 15.Nc5[/font] gives White a small advantage in space (Barcza-Haag, IT, Tallinn, 1969).

If [font color="#FDD017"]8.h3 Nxd2 9.Qxd2 e6[/font] then:

[font color="#FDD017"]10.Be2 Nd7 11.0-0 dxc4 12.Bxc4 c5 13.Rfd1[/font] gives White a small advantage in space (Vescovi-Akobian, Pan-American Ch, Buenos Aires, 2005).
[font color="EAC117"]10.Bd3 Nd7 11.0-0 a6 12.cxd5 exd5 13.Na4[/font] gives White the advantage in space (Stern-E. L'Ami, Euro Ch, Aix-les-Bains, 2011).

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (Calcutta Opening/Makagonov Variation)[/center][center]Position after 6.b4[/center]
[/font]
6...b6

If [font color="red"]6...c6 7.Bb2[/font] then:

If [font color="red"]7...Bg4 8.Qb3[/font] then:

If [font color="red"]8...Bxf3 9.gxf3 e6 10.Be2[/font] then:

[font color="red"]10...Nbd7 11.cxd5 cxd5 12.0-0 Nb6 13.Rfc1 Ne8[/font] gives Black a small advantage in space (Minev-Jansa, Op, Decin, 1976).

[font color="burgundy"]10...a5 11.cxd5 exd5 12.bxa5 Qxa5 13.0-0 Nbd7[/font] gives Black a small advantage in space (Vladimirov-Zhidkov, Soviet ChT, 1967).

If [font color="darkred"]8...a5[/font] then:

[font color="darkred"]9.b5 Nbd7 10.Na4 Rc8 11.h3 Bxf3 12.gxf3[/font] is equal (Tomashevsky-Mamedyarov, Russian ChT, Sochi, 2006).

[font color="magenta"]9.Ne5 Be6 10.b5 Ne4 11.cxd5 a4 12.Qa3 Bxd5[/font] gives Black a small advantage in space (Rezin-Bosiocic, Op, Zadar, Croatia, 2010).

If [font color="darkred"]7...Ne4 8.Rc1 Nxc3 9.Bxc3[/font] then:

[font color="darkred"]9...Bf5 10.b5 cxb5 11.cxb5 Nd7 12.Be2 Nb6 13.0-0[/font] is equal (E. Torre-Ftacnik, IT 8081, Hastings, 1980).
[font color="magenta"]9...Nd7 10.cxd5 cxd5 11.b5 Re8 12.Be2 Nf6 13.h3[/font] gives White a slight advantage in space (Taimanov-Spassov, Op, Palma de Mallorca, 1974).

7.Ba3

If [font color="red"]7.Qb3[/font] then:

If [font color="red"]7...c5 8.bxc5 bxc5 9.cxd5[/font] then:

If [font color="red"]9...Na6 10.Be2 Rb8 11.Qa4[/font] then:

If [font color="red"]11...Nb4 12.0-0 Nfxd5 13.Bd2[/font] then:

[font color="red"]13...Bd7 14.Qxa7 Ra8 15.Qxc5 Rc8 16.Nxd5 Rxc5 17.Nxe7+[/font] gives White a slight advantage; Black cannot play 17...Qxe7 because of 18.Bxb4! pinning the Rook to the Queen (Bagirov-Tukmakov, Soviet Ch, Leningrad, 1977 and Bagirov-Radev, IT, Wroclaw, 1976).
If [font color="darkred"]13...Nxc3 14.Bxc3[/font] then:

[font color="darkred"]14...a5 15.Rfc1 Bd7 16.Qd1 cxd4 17.Bxd4 Bxd4 18.Qxd4[/font] remains equal (Bagirov- Mikhalchishin, Bundesliga 9394, Germany, 1994).
[font color="magenta"]14...Nd5 15.Ba5 Qd7 16.Qxd7 Bxd7 17.Rfc1 cxd4 18.Nxd4[/font] remains equal.

If [font color="darkred"]11...cxd4 12.exd4 Nxd5[/font] then:

[font color="darkred"]13.Nxd5 Qxd5 14.0-0 Nb4 15.Bf4 Rb7[/font] is equal.
[font color="magenta"]13.Bd2 Bd7 14.Qd1 Nxc3 15.Bxc3 Nc5 16.0-0 Ne4[/font] gives Black a small advantage in space and a slight initiative against White's loose Bishop.

If [font color="darkred"]9...Nbd7 10.Be2 Rb8 11.Qa3 Bb7[/font] then:

If [font color="darkred"]12.Rb1 Bxd5 13.Rxb8 Qxb8[/font] then:

If [font color="darkred"]14.Nxd5 14...Nxd5 15.0-0 Rc8[/font] then:

[font color="darkred"]16.Bc4 e6 17.Bxd5 exd5 18.dxc5 Nxc5 19.Bd2 d4[/font] draw (Bagirov-Vaganian, TT, Riga, 1975 and Aleksandrov-Oral, Match, Prague, 2000).
[font color="purple"]16.e4 Nb4 17.Qa4 Qc7 18.Bg5 Nc6[/font] remains equal.

[font color="darkorange"]14.0-0 cxd4 15.Nxd5 Nxd5 16.exd4 Rc8[/font] remains equal.

[font color="magenta"]12.0-0 Nxd5 13.Bd2 cxd4 14.Nxd4 e5 15.Nf3 e4[/font] remains equal (Akobian-Ponomariov, World Cup, Khanty-Mansiysk, 2009).

If [font color="darkred"]7...Bb7 8.Bb2 dxc4 9.Bxc4[/font] then:

If [font color="darkred"]9...Bxf3 10.gxf3 Nbd7[/font] then:

[font color="darkred"]11.Rd1 c6 12.b5 cxb5 13.Bxb5 a6 14.Be2 b5[/font] is equal (Morovic Fernández-Fedoseev, Aeroflot Op, Moscow, 2012).
[font color="darkorange"]11.0-0 c5 12.Rfd1 Qc8 13.Be2 a5 14.a3 axb4[/font] is equal (Spraggett-Yermolinsky, FIDE Knock Out, Las Vegas, 1999).

[font color="magenta"]9...e6 10.0-0 Nbd7 11.Rfd1 a5 12.b5[/font] is equal (M. Damjanovic-Janosevic, IT, Skopje, 1967).

If [font color="blue"]7.Bb2 c5 8.bxc5 bxc5[/font] then:

If [font color="blue"]9.Rc1 9...cxd4 10.Nxd4[/font] then:

If [font color="blue"]10...e5 11.Nb3[/font] then:

[font color="blue"]11...d4 12.exd4 exd4 13.Qxd4 Qxd4 14.Nxd4 Bb7 15.f3[/font] is equal (M. Petursson-Kudrin, IT 8687, Hastings, 1987).
If [font color="darkblue"]11...Bb7!? 12.Ba3! Re8 13.cxd5[/font] then:

[font color="darkblue"]13...Nxd5 14.Nb5 Bf8 15.Bxf8 Rxf8 16.Nc7 Nxc7 17.Qxd8 Rxd8 18.Rxc7[/font] is equal (Averkin-Tseshkovsky, Soviet Ch ½-final, Odessa, 1974).
If [font color="dodgerblue"]13...Bxd5 14.Nxd5[/font] then:

[font color="dodgerblue"]14...Qxd5 15.Qxd5 Nxd5 16.Bb5 Rd8 17.0-0[/font] gives White a small advantage in space.
If [font color="darkcyan"]14...Nxd5?[/font] then White wins after [font color="darkcyan"]15.Bb5! Bf8 16.Bc5 Nb6 17.Bxe8 Qxe8 18.Bxf8[/font] when White is a clear exchange to the good.

If [font color="darkblue"]10...Bb7 11.Qb3 Qb6[/font] then:

[font color="darkblue"]12.Ba3 dxc4 13.Bxc4 Nc6 14.Qxb6 axb6 15.Nxc6 Bxc6 16.Bxe7[/font] is equal (Adamski-W. Schmidt, Polish ChT, Augustow, 1975),
[font color="dodgerblue"]12.c5 Qxb3 13.axb3 Nc6 14.Bb5 Rfc8 15.0-0[/font] is equal (Schneider-Adorjan, IT, Budapest, 1977).

If [font color="darkblue"]9.dxc5[/font] then:

[font color="darkblue"]9...Na6 10.c6 Ne4 11.Nd4 Rb8 12.Qc1 Qa5[/font] gives Black a healthy advantage (Miles-Korchnoi, IT, Brussels, 1986).
[font color="dodgerblue"]9...Ne4 10.Nd4 Nxc3 11.Bxc3 Qc7 12.cxd5 Qxc5 13.Qb3[/font] is equal (Miles-Strebel, Op, Mendrisio, Switzerland, 1985).

7...c5 8.Rc1!? (N)

If [font color="red"]8.bxc5! bxc5 9.Rc1[/font] then:

If [font color="red"]9...cxd4 10.Nxd4[/font] then:

[font color="red"]10...Ba6 11.Qa4 Bxc4 12.Bxc4 dxc4 13.Qxc4 Qd7 14.0-0[/font] gives White a small advantage in space (Rustemov-Vorobiov, Russian Ch Qual, Tomsk, 2004).
[font color="burgundy"]10...dxc4 11.Bxc4 Bb7 12.0-0 Nbd7 13.Be2 Re8 14.Ncb5[/font] gives White a small advantage in space (S. Foisor-Morganzini, Op, Cannes, 2007).

If [font color="darkred"]9...Ne4!?[/font] then:

If [font color="darkred"]10.Bxc5! Nxc5 11.dxc5 Qa5 12.Qd2[/font] then:

[font color="darkred"]12...dxc4 13.Bxc4 Rd8 14.Nd5 Qxd2+ 15.Nxd2 Rd7 16.Nb4[/font] gives White a small advantage in space (Meister-Ruck, Bundesliga 1011, Eppingen, 2011).
If [font color="magenta"]12...Na6 13.c6 Rd8 14.Nxd5[/font] then:

[font color="magenta"]14...Qa3? 15.Nf6+! Bxf6 16.Qxd8+[/font] gives White two extra pawns (Bilobrk-Berkes, Bosnian ChT, Vogosca, 2007).
[font color="darkorange"]14...Qxd2+ 15.Nxd2 e6 16.Nc3[/font] continues to give White a small advantage.

If [font color="magenta"]10.cxd5 Nxc3 11.Rxc3 cxd4[/font] then:

If [font color="magenta"]12.Nxd4 Qxd5 13.Qb3 Be6 14.Qxd5 Bxd5[/font] then:

If [font color="magenta"]15.Bb5 a6 16.Ba4 Ra7 17.0-0[/font] then:

[font color="magenta"]17...Bf6 18.Rfc1 Nd7 19.Nc6 Bxc6 20.Rxc6 Rb8 21.h3[/font] leaves White slightly better (Dimitriov-E. Hansen, World Jr Ch, Athens, 2012).
[font color="hotpink"]17...Bxa2 18.Rfc1 a5 19.Bb5 a4 20.R3c2 Bd5 21.Rc7[/font] is equal (Korchnoi-Svidler, Euro Club Cup, Fügen, 2006).

[font color="purple"]15.Rc7 Bxd4 16.exd4 Nc6 17.Ba6 Nxd4 18.0-0 Rfe8[/font] is equal, but tilting toward Black (Houdini).

[font color="darkorange"]12.exd4 Qxd5 13.Be2 Nc6 14.0-0 Nxd4 15.Nxd4 Qxd4[/font] gives Black a slight edge (Jankovic-Zelic, Op, Zagreb, 2007).

8...cxb4!?

Black captures toward the flank and allows White a center majority.
[font color="red"]8...cxd4! 9.exd4 Ba6 10.Rc2 Bxc4 11.Bxc4 dxc4[/font] gives Black the advantage in space.

[center]BLACK: Mariya Muzychuk[/center]

[center][/center]

[center]WHITE: Nino Khurtzidze[/center][center]Position after 8...cb4:p[/center]

9.Bxb4!

White dodges a bullet (well, OK, a dart) and equalizes.

9...Nc6

[font color="red"]9...Bb7 10.Ba3 Nbd7 11.Qb3 dxc4 12.Bxc4 Bxf3 13.gxf3[/font] is equal.

10.Ba3 Bb7 11.cxd5

If [font color="red"]11.c5 Nd7[/font] then:

[font color="red"]12.cxb6 axb6 13.Qb3 Na5 14.Qb5 Re8 15.Nxd5 Nc6[/font] remains equal.
[font color="darkred"]12.Rb1 Re8 13.Be2 e5 14.0-0 exd4 15.exd4 Qc8[/font] remains equal.

11...Nxd5 12.Be2 Rc8 13.Qd2

If [font color="red"]13.Nb1 Ncb4[/font] then:

If [font color="red"]14.Rxc8 Qxc8 15.Bxb4 Nxb4 16.0-0[/font] then:

[font color="red"]16...Qe6 17.a3 Nd5 18.Qb3 Rc8 19.Bc4 Qc6 20.Nbd2[/font] remains equal; White is stronger in the center and should play aggressively; Black has a queenside pawn majority and can preserve that strategic advantage for now while exchanging down to a favorable ending.
[font color="magenta"]16...Ba6 17.Bxa6 Qxa6 18.Qb3 Nc6 19.Rc1 Rc8 20.Qc4[/font] remains equal.

[font color="darkred"]14.e4!? Nf4! 15.Bxb4 Bxe4 16.Bf1 Qd7 17.Bd2 Qg4[/font] gives Black an attack on White's King while it is immobile in the center and better pawn structure.

If [font color="blue"]13.0-0?! Nxd4!![/font] then:

[font color="blue"]14.Nxd5 Nxe2+ 15.Qxe2 Bxd5 16.Rfd1 Rxc1 17.Rxc1 Qd7[/font] gives Black an extra pawn.
[font color="darkblue"]14.Nxd4? Nxc3! 15.Rxc3 Rxc3 16.Nb5 Qxd1 17.Rxd1 Rc2[/font] leaves Black with a material advantage of an exchange plus a pawn.

13...Na5 14.0-0 Qd7 15.Bb5 Qe6 16.Ng5

[font color="red"]16.Nb1 Rxc1 17.Rxc1 Rc8 18.Bf1 Rxc1 19.Qxc1 Bh6[/font] remains equal.

16...Qg4 17.Nxd5

If [font color="red"]17.Nce4[/font] then:

[font color="red"]17...Rxc1 18.Rxc1 Qf5 19.Bd3 Rc8 20.Nf3 Rxc1+ 21.Qxc1[/font] remains equal.
[font color="darkred"]17...f5 18.Bd7 Nc4 19.Rxc4 Rxc4 20.Bxe7 Nxe7 21.h3[/font] remains equal.

17...Rxc1 18.Qxc1!?

White should let the Rook do the heavy lifting.
If [font color="red"]18.Rxc1 Bxd5 19.e4 Bf6 20.Nxh7 Kxh7 21.exd5 Bg5[/font] remains equal.

18...Bxd5!

Black takes a small advantage in space.

19.e4 Bf6!?

Black can maintain the initiative by attacking White's exposed Queen.
If [font color="red"]19...Rc8 20.Qe3 Nc4 21.Bxc4 Bxc4 22.Ra1 a5[/font] gives White the Bishop pair and a small advantage in space; White has a better center.

[center]BLACK: Mariya Muzychuk[/center]

[center][/center]

[center]WHITE: Nino Khurtzidze[/center][center]Position after 19...Bg7f6[/center]

20.exd5!

If [font color="red"]20.Nxh7!![/font] then:

[font color="red"]20...Qxe4! 21.Nxf6+ exf6 22.f3 Qxd4+ 23.Kh1 Rd8 24.Bb2[/font] is equal.
If [font color="darkred"]20...Kxh7!? 21.exd5 Rd8 22.d6[/font] then:

[font color="darkred"]22...exd6 23.Qc7 Qe6 24.Bb4 Qxa2 25.Bxa5 bxa5 26.Bc4[/font] gives White a small advantage that enables her to easily recover her sacrificed pawns.
[font color="magenta"]22...Rc8?! 23.Qc7!! Rxc7 24.dxc7 Qc8 25.Rc1 Bg5 26.Ba6[/font] forces Black to return the Queen for a Rook and a Bishop or allow the c-pawn to queen.

20...Bxg5

Black has only a slight edge.

21.Qc7 Qxd4 22.Qxa7

If [font color="red"]22.Qd7 Bf6 23.Ba6 Qd2 24.Qxa7 Qxa2 25.Bxe7 Bxe7 26.Qxe7[/font] continues to give Black a slight edge.
[font color="darkred"]22...h5!? 23.Bc1 Bd2 24.Ba3 Bg5 25.Bc1 Bf6[/font] is equal.

22...Qxd5 23.Qxb6 Ra8 24.g3!?

Black apparently does not bellieve Black abandon the center in order to grab the a-pawn.
[font color="red"]24.Bb4 Qxa2 25.Re1 Bf6 26.Be2 e6 27.Bf3 Nc4[/font] continues to give Black a slight advantage.

24...Qxa2!

Black wins the pawn and takes a small advantage in space.

25.Bb4 Nc4!?

Now it's Black's turn to slip.
If [font color="red"]25...e6 26.Bc3 Qd5 27.Be2 Nc4 28.Bxc4 Qxc4[/font] continues to give Black a small advantage with an extra pawn and a more active Rook.

26.Qc5!?

White double attacks the Knight and Bishop
If [font color="red"]26.Qb7![/font] then:

[font color="red"]26...Ne5 27.Bc3 Bf6 28.Bxe5 Bxe5 29.Bc4 Qa4 30.Qxe7[/font] is equal.
[font color="darkred"]26...Nd6!? 27.Bxd6 exd6 28.Bc4 Qa7 29.Bxf7+ Kg7 30.Rb1[/font] gives White a slight edge after restoring the material balance and saddling Black with a weak pawn.

[font color="blue"]26.Bxc4!? Qxc4 27.Qb7 Qc8 28.Qxc8+ Rxc8 29.Rd1 Rc4[/font] continues to give Black an extra pawn, but all pawns in the game are on the kingside, giving the defender good chances of equalizing and drawing.

[center]BLACK: Mariya Muzychuk[/center]

[center][/center]

[center]WHITE: Nino Khurtzidze[/center][center]Position after 26.Qb6c5[/center]

26...Nd2!!

The Bishop is defended tactically.

27.Rd1

[font color="red"]27.Qxg5??[/font] loses immediately to [font color="red"]27...Nf3+!.[/font]

27...Ne4 28.Qd4

[font color="red"]28.Qb6!? Qc2! 29.Rf1 Nd2 30.Bxd2 Qxd2 31.Bc4 e6[/font] gives Black an extra pawn.

28...Nxf2!!

The sacrifice is a sham.

29.Qxf2 Qb3 30.Qe1

This is the best way to avoid the threatened30...Be2, pinning and winning the Queen.
If [font color="red"]30.Qe2? Qxb4! 31.Kh1 e6 32.Qc4 Qa5[/font] when:

If [font color="red"]33.Qc6 Rb8 34.Bc4 Qa7[/font] then:

[font color="red"]35.Qf3 Bh6 36.Rf1 Bg7 37.Qe4 Qd7 38.Rf2 Rb4[/font] leaves Black with two extra pawns.
If [font color="darkred"]35.Bd3 Rb2[/font] then:

[font color="darkred"]36.Rb1 Rxb1+ 37.Bxb1 Qf2 38.Qg2 Qe1+ 39.Qg1 Qc3[/font] leaves Black with two extra pawns.
If [font color="magenta"]36.Rf1 Be3[/font] then:

If [font color="magenta"]37.Rb1 Rxb1+ 38.Bxb1 Qa5[/font] then:

If [font color="magenta"]39.Kg2 Qd2+ 40.Kh3 Bg1[/font] then:

[font color="magenta"]41.Qh1 Qe3 42.Qa8+ Kg7 43.Qh1 e5 44.Bc2 Qh6+[/font] leaves Black with two extra pawns.
[font color="burgundy"]41.Qc8+ Kg7 42.Qc2 Qh6+ 43.Kg2 Qxh2+ 44.Kf3 Qh1+[/font] leaves Black with three extra pawns.

If [font color="darkorange"]39.Qf3 Qe1+ 40.Kg2 Qg1+ 41.Kh3 Qxb1 42.Qxe3 Qf1+[/font] then:

[font color="darkorange"]43.Kh4 Qg2 44.Kg5 Qd5+ 45.Kf6 Qf5+ 46.Ke7 e5[/font] leaves White two pawns to the good.
If [font color="purple"]43.Kg4[/font] then [font color="purple"]43...Qf5+ 44.Kh4 Qh5#.[/font]

[font color="#D0A020"]37.Qc3 Qa8+[/font] leads directly to mate.

If [font color="darkred"]33.Qe2 Rc8[/font] then:

[font color="darkred"]34.Rf1 Rc3 35.Ba6 Kg7 36.Qb5 Qxb5 37.Bxb5 f5[/font] gives Black two extra pawns and the more active Rook.
[font color="magenta"]34.Ba6 Rb8 35.Rf1 Bh6 36.Bd3 Qa7 37.Qc2 Bg7[/font] gives Black two extra pawns and the more active Rook.

30...Rb8!?

Black blows her engine with the line in sight.
[font color="red"]30...Be3+ 31.Kg2 Ra2+ 32.Be2 Qe6 33.Rd8+ Kg7[/font] gives Black a small advantage with more activity, although he has only two pawns for a Bishop.

31.Rd3!

White has equalized.

31...Qe6 32.Bd7?

Harrassing the Black Queen will just make it mad.
If [font color="red"]32.Ba4 Qb6+ 33.Kf1[/font] then:

If [font color="red"]33...Qb7 34.Bc3 Qh1+ 35.Kf2 Qxh2+[/font] then:

[font color="red"]36.Kf1 Bf6 37.Bxf6 exf6 38.Rd2 Qh3+ 39.Kg1 Kg7[/font] remains equal.
[font color="burgundy"]36.Kf3 Bf6 37.Bxf6 exf6 38.Rd2 Qh3 39.Kf2 Kg7[/font] remains equal.

If [font color="darkred"]33...Qxb4 34.Rd8+ Kg7 35.Qe5+ Bf6 36.Qxb8[/font] then:

If [font color="darkred"]36...Qc4+ 37.Kf2 Bd4+ 38.Ke1 Bc3+[/font] then:

If [font color="darkred"]39.Kf2 Bd4+[/font] then:

If [font color="darkred"]40.Ke1 Qc1+[/font] then:

[font color="darkred"]41.Bd1 Qe3+ 42.Be2 Qc1+ 43.Bd1 Qe3+ 44.Be2 Qc1+ etc.[/font] draws by repeptition.
[font color="hotpink"]41.Ke2 Qc4+ 42.Ke1[/font] draws by repetition.

[font color="purple"]40.Rxd4 Qxd4+ 41.Ke2 Qe4+ 42.Kf2 Qxa4[/font] gives White two extra pawns.

If [font color="darkorange"]39.Kd1!? Qxa4+! 40.Ke2 Qe4+ 41.Kd1 h5 42.Qb5 Bb4[/font] gives Black two pawns for the exchange and a much safer King.

[font color="magenta"]36...Qxa4 37.Rg8+ Kh6 38.Qf4+ Qxf4+ 39.gxf4 e5[/font] remains equal.

[center]BLACK: Mariya Muzychuk[/center]

[center][/center]

[center]WHITE: Nino Khurtzidze[/center][center]Position after 32.Bb5d7[/center]

32...Qb6+!

Black wins back the sacrificed piece and goes up two pawns.
Also good is [font color="red"]32...Qc4! 33.Qc3 Qxb4 34.Qxb4 Rxb4[/font] then:

If [font color="red"]35.Bc6 f5 36.Bd5+ Kg7[/font] then:

[font color="red"]37.Ba2 h5 38.Rb3 Ra4 39.Rb2 Bf6 40.Rd2 e5[/font] gives White two extra pawns and more freedom.
If [font color="darkred"]35.Rd5 f5 36.Be6+ Kg7[/font] then:

If [font color="darkred"]37.Rd1 Be3+ 38.Kf1 Kf6[/font] then:

If [font color="darkred"]39.Rd3 Bd4 40.Bg8 e5[/font] then:

[font color="darkred"]41.Rd2 h6 42.Rc2 Rb1+ 43.Ke2 e4 44.Bh7 Rh1[/font] gives Black two extra pawns, a safer King and a mobile passer.
[font color="purple"]41.Bxh7?? Rb1+! 42.Ke2 Kg7 43.Bxg6 Kxg6[/font] leaves White a piece to the good.

If [font color="darkorange"]39.Bg8 h5 40.Re1 Bd4 41.Re2 g5 42.Bd5 e5 43.Bg2 e4[/font] gives Black two extra pawns, aadvanced pawns putting White in a vise and a mobile passer.

[font color="magenta"]37.Rd3 h5 38.Rd1 Rb2 39.Kh1 h4 40.Rd3 Rb6[/font] leaves Black with two extra pawns.

[font color="darkorchid"]37.Rc3 h5 38.Kg2 Rb2+ 39.Kg1 h4 40.Ra3 h3[/font] gives Black two extra pawns and a fierce initiative.

33.Kg2 Qxb4 34.Qd1

If [font color="red"]34.Qxb4 Rxb4[/font] then:

[font color="red"]35.Bc6 Rb6 36.Bf3 Rb2+ 37.Kh3 Kg7 38.Bd5 e5[/font] gives Black two extra pawns, a dafer King and a mobile passer.
[font color="darkred"]35.Rd5 Rb2+ 36.Kh1 Bh6 37.Bc6 Bf8[/font] give Black two extra pawns and a safer King.

34...Qe4+

Black wins quicker after [font color="red"]34...Qb2+![/font] then:

If [font color="red"]35.Kh3 Qa2[/font] then:

If [font color="red"]36.Rd5 Rb2[/font] then:

If [font color="red"]37.Be6 Rxh2+ 38.Kg4 Qc4+[/font] then:

If [font color="red"]39.Qd4 Qe2+ 40.Kxg5 h6+ 41.Kf4 g5+[/font] then:

[font color="red"]42.Rxg5+ hxg5+ 43.Kxg5 Rh5+ 44.Kf4 fxe6[/font] leads to mate.
If [font color="burgundy"]42.Kf5[/font] then [font color="burgundy"]42...Qxe6#.[/font]

If [font color="#D0A020"]39.Kxg5[/font] then [font color="#D0A020"]39...h6#.[/font]

If [font color="darkred"]37.Qh1 Qa8[/font] then:

[font color="darkred"]38.Qe4 Bf6 39.Bg4 Qa2 40.Qh1 h5 41.Bf3 Qa6[/font] threatens 42...Qe6#.
[font color="magenta"]38.Bg4 e6 39.Rd1 Qc8 40.Ra1 Kg7 41.Qe4 f5[/font] gives Black two extra pawns and avenues fo attack leading to the White King.

If [font color="darkred"]36.Qh1[/font] then:

[font color="darkred"]36...Rb2 37.Rd1 h5 38.Ra1 Qc4 39.Rb1 Rd2[/font] continues to leave Black two pawns up with a safer King and more activity..
[font color="magenta"]37.Rd4 h5 38.Ra4 Qb3 39.Ra5 Bf6 40.Ra8+ Kg7[/font]leads to mate.

If [font color="darkred"]35.Kh1 Qa2 36.Qf3[/font] then:

If [font color="darkred"]36...e6! 37.Be8 Rb1+ 38.Rd1 Rxd1+ 39.Qxd1 Qa8+ 40.Kg1 Be3+ 41.Kf1 Qxe8[/font] leaves Black a piece to the good.
If [font color="magenta"]36...Rb1+ 37.Rd1 Rb2[/font] then:

I[font color="magenta"]38.Kg1 Re2 39.Kf1 Re3[/font] then:

[font color="darkred"]40.Qg2 Qa6+ 41.Kg1 Re2 42.Qf3 Be3+[/font] leads to mate.
If [font color="purple"]40.Qd5[/font] then Black wins after [font color="purple"]40...Qe2+ 41.Kg1 Re5 42.Bg4 Qe3+ 43.Kf1 Rxd5.[/font]

If [font color="darkorange"]38.Bc6[/font] then Black wins after [font color="darkorange"]38...Rf2 39.Qe4 Rxh2+ 40.Kg1 Qf2#.[/font]

35.Qf3 Rb2+ 36.Kh3

If [font color="red"]36.Kf1[/font] then Black wins after [font color="red"]36...Qc4 37.Be8 Rb1+ 38.Kg2 Qa2+ 39.Kh3 Rb2.[/font]

36...Qxf3!?

The Queen exchange will make Black's mission more difficult, but she still wins.
If [font color="red"]36...Qc4![/font] then:

[font color="red"]37.Qd1 Qa2 38.Qh1 Bf6 39.Rd1 Qb3 40.Bg4 h5[/font] gives White two extra pawns and an easy win.
If [font color="darkred"]37.Rd1 Qc2 38.Rh1 Bf6[/font] then:

[font color="darkred"]39.Bc6 h5 40.Qe4 g5 41.Qxc2 g4+ 42.Kg2 Rxc2+[/font] wins the Bishop.
[font color="magenta"]39.Qd5 e6 40.Qa8+ Kg7 41.Qf3 Qd2 42.Kg4 Qg5+[/font] leads to mate,

[center]BLACK: Mariya Muzychuk[/center]

[center][/center]

[center]WHITE: Nino Khurtzidze[/center][center]Position after 36...Qe4f2:Q[/center]

37.Rxf3!

White gets a temporary stay of execution, not a communtation of the sentence.

37...Kg7 38.Kg4 Bf6

Also good for Black is [font color="red"]38...f5+ 39.Kh3 Bf6 40.Be6 h5 41.Rb3 Rf2[/font] when it will cost White a piece to avoid checkmate.

39.h4 h5+ 40.Kf4

If [font color="red"]40.Kh3[/font] then:

[font color="red"]40...Bd4 41.Rd3 Bg1 42.g4 hxg4+ 43.Bxg4 Bh2 44.Bf3 f5[/font] leaves Black two pawns up with active pieces.
If [font color="darkred"]40...Be5[/font] then Black wins after [font color="darkred"]41.Rd3 f5 42.Re3 Bd6 43.Rd3 f4 44.Bc6 fxg3.[/font]

40...Re2 41.Rd3 Re1

If [font color="red"]41...Be5+ 42.Kf3 Rb2[/font] then:

[font color="red"]43.Ba4 f5 44.Re3 Bf6 45.Re6 Kf7 46.Rc6 Rd2[/font] continues to give Black two extra pawns and a safer King.
If [font color="darkred"]43.Re3 Bd6 44.Ba4 f5[/font] then:

If [font color="darkred"]45.Rc3 e5 46.Rc2 e4+[/font] then:

[font color="darkred"]47.Kg2 Rb4 48.Ra2 Rc4 49.Kh2 e3 50.Bd1 Rxh4+[/font] gives Black three extra pawns.
[font color="darkorange"]47.Kf2 Rb4 48.Be8 Rb3 49.Rc6 Bxg3+[/font] leaves Black three pawns to the good.

[font color="magenta"]45.Bd1 Ra2 46.Rc3 Rd2 47.Be2 Bxg3 48.Kxg3 Rxe2[/font] wins a pawn, leaving Black three pawns up.

42.Kf3 Be5 43.Bc6 f5 44.Be8

If [font color="red"]44.Kg2 Rc1 45.Bd5 Rc2+[/font] then:

If [font color="red"]46.Kf1 Bd6 47.Bb3 Rh2[/font] then:

If [font color="red"]48.Kg1 Rb2 49.Bd5 Bc5+[/font] then:

[font color="red"]50.Kh1 Bf2 51.Rc3 e5 52.Rc7+ Kh6 53.Bf7 Bxg3[/font] leaves Black three pawns to the good with a safer King.
[font color="darkorange"]50.Kf1 Rf2+ 51.Ke1 Rh2 52.Kf1 f4 53.gxf4 Rf2+[/font] continues to leave White two pawns up.

[font color="magenta"]48.Rf3 f4 49.gxf4 Kf6 50.Kg1 Rxh4 51.Rc3 Rxf4[/font] gives Black three extra pawns.

[font color="darkred"]46.Kg1 Bd6 47.Be6 Bc5+ 48.Kh1 Kf6 49.Bb3 Rc1+[/font] leaves Black two pawns to the good.

44...Bd6 45.Kf2 Rb1

[font color="red"]45...Ra1 46.Bc6 Bc5+ 47.Kg2 Ra2+ 48.Kh1 e5[/font continues to give Black two extra pawns and a safer King.

46.Kf3

This is tantamount to surrender.
White will last longer after [font color="red"]46.Kg2 Rb2+ 47.Kg1 Rb6 48.Kg2 e5 49.Rc3 Rb2+,[/font] but she's completely lost whatever she plays.

[center]BLACK: Mariya Muzychuk[/center]

[center][/center]

[center]WHITE: Nino Khurtzidze[/center][center]Position after 46.Kf2f3[/center]

46...Rb8

Black gains time on the Bishop.

47.Bd7

If [font color="red"]47.Ba4 Rb4[/font] then:

[font color="red"]48.Bd1 Rb2 49.Rc3 Rd2 50.Be2 Bxg3 51.Kxg3 Rxe2[/font] leaves Black three pawns to the good.
[font color="darkred"]48.Bb3 Rg4! 49.Kf2 f4 50.gxf4 Rxf4+ 51.Kg1 Rxh4[/font] leaves Black three pawns to the good.

47...Rb6

If [font color="red"]47...Rb2[/font] then:

If [font color="red"]48.Rd5[/font] then Black wins after [font color="red"]48...Rb3+ 49.Kf2 Bxg3+ 50.Kg1 Bxh4 51.Ra5 f4.[/font]
If [font color="darkred"]48.Rd1[/font] then Black wins after [font color="darkred"]48...Rb3+ 49.Ke2 Bxg3 50.Rd4 e5 51.Rd5 f4.[/font]

48.Rc3 Rb2 49.Be8 Be5 50.Rd3

If [font color="red"]50.Re3 Bd6 51.Re6 Bc5 52.Kf4[/font] then Black wins after [font color="red"]52...Rb4+ 53.Kf3 Rg4 54.Re2 Bd6 55.Rg2 Rb4.[/font]
If [font color="darkred"]52.Rxg6+ Kf8[/font] then:

[font color="darkred"]53.Kf4 Rb4+ 53.Kf3 Rg4 54.Re2 Bd6 55.Rg2 Rb4.[/font]
If [font color="magenta"]53.Bd7[/font] then [font color="magenta"]53...Rf2#) 53...Kxe8 54.Kxf5 Kf7[/font] leaves Black a piece to the good.

50...Bc7 51.Ra3 Bb6 52.Kf4 Kf6 0-1

If [font color="red"]53.Rb3[/font] then [font color="red"]53...Rf2+ 54.Rf3 e5#.[/font]
Kalbatoni Khurtsidze resigns.

Jack Rabbit

(45,984 posts)

7. Ni (United States) - Zhukova (Ukraine), Round 8 (Opening Theory: Tal-Indian/Pawn Storm Opening)

Reply to Jack Rabbit (Reply #5)

Tue Apr 16, 2013, 01:52 PM

Apr 2013

[center][/center]

[center]Natalia Zhukova[/center][font size="1"]Photo by Frank Hoppe (http://commons.wikimedia.org/wiki/User:Samson1964) in Wikimedia Commons (http://commons.wikimedia.org/wiki/File:Schukowa_natalja_20081119_olympiade_dresden.jpg)
(Public Domain)
[/font]

Viktorija Ni (United Sates) - Natalia Zhukova (Ukraine)
Women's World Team Championship, Round 8/Board 4
Astana, 11 March 2013

West Indian Game: Tal-Indian Defense (Pawn Storm Opening/Taimanov Variation) (Modern Benoni)

1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 d6 6.e4 g6

Tal caused this system, conventionally known as the Modern Benoni, to be re-evaluated when he used it to defeat several opponents, including Botvinnik in the 1960 World Championship Match. It is again out of favor after several decades of use; Bobby Fischer used it to win a game from Boris Spassky in their 1972 title match.

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Tal-Indian Defense (Modern Benoni)[/center][center]Position after 6...g7g6[/center]

7.f4

This is the beginning of the the Pawn Storm Variations to the Tal-Indian.

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Tal-Indian Defense (Pawn Storm Opening)[/center][center]Position after 7.f2f4[/center]

7...Bg7 8.Bb5+

The text is the Taimanov Opening.
[font color="red"](Four Pawns' Opening) [/font]If [font color="red"]8.Nf3 0-0 9.Be2[/font]

[font color="red"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Tal-Indian Defense (Pawn Storm Opening/Four Pawns' Variation)[/center][center]Position after 9.Be2[/center]
[/font]

(This position also arises by 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 0-0 6.Nf3 c5 (6...e5 is the Four Pawns' Opening to the King's Indian Defense) 7.d5 e6 8.Be2 exd5 9.exd5) then:

If [font color="red"]9...Bg4[/font] then:

If [font color="red"]10.0-0 Nbd7[/font] then:

If [font color="red"]11.h3 Bxf3 12.Bxf3 Re8 13.Re1[/font] then:

If [font color="red"]13...Qa5 14.Be3 b5 15.a3 Nb6[/font] then:

If [font color="red"]16.e5[/font] then:

If [font color="red"]16...Nc4 17.exf6 Nxe3 18.Rxe3 Rxe3 19.fxg7 Rae8 20.f5[/font] then:

If [font color="red"]20...b4 21.axb4 Qxb4[/font] then:

If [font color="red"]22.Qd2 Qh4 23.Rf1 a6 24.Bg4[/font] then:

[font color="red"]24...Qg3 25.Qf2 Qxf2+ 26.Rxf2 Kxg7 27.Be2 gxf5 28.Bxa6 Rb8[/font] is equal (Banikis-Dochev, Op, Kavala, Greece, 2001).
[font color="burgundy"]24...Re1 25.Be2 Rxf1+ 26.Bxf1 Re1 27.Qf2 Qxf2+ 28.Kxf2[/font] gives White a small advantage with two minor pieces for a Rook and pawn (Van Ketel-6.Gretarsson, Euro Club Cup, Saint Vincent, 2005).

[font color="#E0A020"]22.fxg6 hxg6 23.Qd2 Qh4 24.Rf1 a6 25.Nd1 R3e5[/font] is equal (Banikis-Gallagher, French ChT, Monte Carlo, 2001).

If [font color="darkred"]20...gxf5 21.Qd2[/font] then:

[font color="darkred"]21...b4 22.Ne2 c4 23.Ng3 c3 24.bxc3 bxc3[/font] gives Black more activity (S. Ernst-Baldus, Vlissingen, 2001).
[font color="magenta"]21...c4 22.Rf1 Qd8 23.Qd4 a6 24.a4 Rd3 25.Qf2[/font] is equal (Mercadal Benejam-Hamilton, Corres, 2001).

If [font color="darkred"]16...Nfd7[/font] then:

[font color="darkred"]17.e6 Nc4 18.exd7 Rxe3 19.Rxe3 Nxe3 20.Qe2 Qd8[/font] is equal (Vaiser-Banikas, French ChT, Bordeaux, 2001).
[font color="magenta"]17.Bd2 dxe5 18.d6 Rad8 19.Nd5 Qa4 20.Ne7+ Kf8[/font] is equal.

If [font color="darkred"]16.Bf2!? Nc4! 17.Qc2 Nd7 18.Be2[/font] then:

[font color="darkred"]18...Ndb6 19.a4 b4 20.Nb5 b3 21.Qxb3 Nd2[/font] gives Black more activity, a slight initiative and assurance of winning a pawn (Gessat-Habermehl, Corres, 1999).
[font color="magenta"]18...Rab8!? 19.a4 b4 20.Nb5 Nxb2 21.Nxd6 b3[/font is equal (Cebalo-Rasic, Op, Pula, 2001).

If [font color="darkred"]13...a6 14.a4 c4 15.Be3 Qa5 16.Kh1[/font] then:

[font color="darkred"]16...Nc5 17.Bxc5 Qxc5 18.e5 dxe5 19.fxe5 Nd7 20.Ne4 Qb4 21.e6 fxe6 22.Bg4 Nf8[/font] is equal tilting toward Black (Verdier-Alvarez, Corres, 1999).
[font color="magenta"]16...Re7 17.Qd2 Rae8 18.Qf2 Nxe4 19.Nxe4 Rxe4 20.Bxe4 Rxe4 [/font] is equal tilting toward White (Peicheva Juergens-J.Polgar, IT, Novi Sad, 1990).

If [font color="darkred"]11.Re1 Re8[/font] then:

If [font color="darkred"]12.Bf1 a6 13.a4 Nh5[/font] then:

If [font color="darkred"]14.h3 Bxf3 15.Qxf3 Qh4[/font] then:

[font color="darkred"]16.Be3 f5 17.exf5 gxf5 18.Kh2 Ndf6 19.Bf2 Qxf4+[/font] leaves Black with an extra pawn (Khmelniker-Dworakowska, Euro Ch, Warsaw, 2005).
If [font color="burgundy"]16.Rd1[/font] then Black still wins a pawn after [font color="burgundy"]16...Qg3 17.Be2 Bd4+ 18.Kh1 Qxf3 19.Bxf3 Bxc3 20.bxc3 Ng3+[/font] (Khmelniker-Cvitan, Euro Ch, Dresden, 2007).[/font]

If [font color="magenta"]14.g3?![/font] then:

[font color="magenta"]14...f5 15.Be2 Bxc3 16.bxc3 Rxe4 17.Ng5 Rxe2[/font] forces White to recapture with the Rook, putting it at the center of a very annoying pin (Khmelniker-David, Euro Ch, Dresden, 2007).
[font color="darkorange"]14...Bd4+! 15.Kg2 Ndf6 16.Qd3 Bxc3 17.bxc3 Rxe4 18.Rxe4 Bf5![/font] gives Black an extra pawn and a deadly pin at e4.

[font color="darkorchid"]12.h3 Bxf3 13.Bxf3[/font] transposes to the [font color="red"]main line.[/font]

If [font color="darkred"]10.e5[/font] then:

If [font color="darkred"]10...dxe5 11.fxe5 Bxf3 12.Bxf3 Nfd7 13.e6 Ne5[/font] then:

If [font color="darkred"]14.0-0 fxe6 15.Be4[/font] then:

If [font color="darkred"]15...Rxf1+ 16.Qxf1[/font] then:

[font color="darkred"]16...Ng4 17.g3 Bd4+ 18.Kg2[/font] is equal (Andrejic-Zufic, Op, Rijeka, 2010).
If [font color="magenta"]16...Kh8 17.Qb5 exd5[/font] then:

[font color="magenta"]18.Qxb7!? Nbc6! 19.Bg5 Qe8 20.Nxd5 Rb8 21.Qc7 Rc8[/font] leaves the White Queen embarrassed and Black poised for attack (Geller-Liptay, IT, Prague, 1966).
[font color="darkorange"]18.Bxd5 Nbd7 19.Qe2 Qc7 20.Bf4 Re8 21.Bg3 c4[/font] continues to give Black a small advantage in space.

[font color="burgundy"]15...Kh8 16.Rxf8+ Qxf8 17.dxe6 Nbc6 18.Bg5 c4 19.Kh1[/font] is equal (Andrejic-Ilic, Op, Kavala, Greece, 2012).

[font color="#E0A020"]14.exf7+ Rxf7 15.0-0 Nbd7 16.d6 Nxf3+ 17.Rxf3 Ne5[/font] is equal (Leykekhman-Sherzer, Op, New York, 1994).

[font color="darkorchid"]10...Bxf3 11.Bxf3 dxe5 12.fxe5 Nfd7[/font] transposes into [font color="darkred"]this line.[/font]

If [font color="darkred"]9.Bd3[/font] then:

If [font color="darkred"]9...Re8 10.0-0 c4 11.Bc2 b5 12.a3[/font] then:

[font color="darkred"]12...Qb6+ 13.Qd4 Qxd4+ 14.Nxd4 Nxe4 15.Ndxb5 Nxc3 16.bxc3[/font] is equal (Rosenfeld-Khokhlov, Corres, 1989).
[font color="burgundy"]12...Nbd7 13.Be3 Nb6 14.Bd4 Bd7 15.Re1 a5 16.Qd2[/font] is equal (Landaw-Peters, Op, Los Angeles, 2003).

If [font color="magenta"]9...b5 10.Bxb5 Nxe4 11.Nxe4 Qa5+[/font] then:

If [font color="magenta"]12.Kf2 Qxb5 13.Nxd6[/font] then:

If [font color="magenta"]13...Qb6 14.Nc4 Qa6 15.Qe2[/font] then:

[font color="magenta"]15...Nd7 16.Rd1 Bb7 17.Nce5 Nxe5 18.fxe5 Qxe2+ 19.Kxe2[/font] is equal (A. Zaitsev-Savon, Soviet Ch, Yerevan, 1962).
[font color="burgundy"]15...Bd7 16.Be3 Bb5 17.Rhc1 Re8[/font is equal(A. Zaitsev-Bogdanovic, Chigorin Mem, Sochi, 1967).

[font color="#E0A020"]13...Qa6 14.Nxc8 Rxc8 15.Ne5 Rd8 16.Re1 f6 17.Ng4[/font] is equal (A. Zaitsev-Khodos, Soviet Ch, Yerevan, 1962).

If [font color="darkorange"]12.Nfd2 Qxb5 13.Nxd6 Qd7 14.N2c4[/font] then:

[font color="darkorange"]14...Bd4 15.Qf3 Ba6 16.f5 Re8+ 17.Kd1 Bxc4 18.Nxc4[/font is equal (S. Rubinstein-Chevaldonnet, TM, Brussels, 1977).
[font color="purple"]14...Ba6 15.0-0 Bd4+ 16.Kh1 Bxc4 17.Nxc4 Qxd5 18.Ne5 Nc6 19.Nxc6 Qxc6[/font] draw (Denayer-Durando, Op, Metz, 2001),

[font color="blue"](Mikenas Opening)[/font] If [font color="blue"]8.e5[/font]

[font color="blue"]
[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Tal-Indian Defense (Pawn Storm Opening/Mikenas Variation)[/center][center]Position after 8.e4e5[/center]
[/font]

If [font color="blue"]8...Nfd7 9.Nb5 dxe5 10.Nd6+[/font] then:

If [font color="blue"]10...Ke7 11.Nxc8+ Qxc8 12.Nf3 Re8 13.fxe5[/font] then:

If [font color="blue"]13...Nxe5 14.Bb5 Nbd7 15.0-0 Kf8 16.Nxe5 Rxe5 17.Bf4[/font] then:

[font color="blue"]17...c4 18.Qd4 Rh5 19.Qxc4 Qxc4 20.Bxc4 Rc8 21.Bb3 Bd4+ 22.Kh1[/font] is equal (Saric-Kanovsky, Mitropa Cup, Brno, 2006).
[font color="darkcyan"]17...a6 18.Bxe5 Nxe5 19.Be2 c4 20.Kh1[/font] gives White the material advantagel (Sosonko-Jakobsen, ZT, Barcelona, 1975).

[font color="dodgerblue"]13...Kf8 14.e6 fxe6 15.d6 Kg8 16.Bc4 Nc6 17.0-0 Nb6[/font] gives Black good winning chances (Vukovich-Petrosian, IT, Barcelona, 1980).

[font color="darkblue"]10...Kf8 11.Nf3 h6 12.Be2 Qc7 13.Nxc8 Qxc8[/font] is equal (Ivanisevic-Kovacevic, Yugoslav Ch, Niksic, 1997).

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Tal-Indian Defense (Pawn Storm Opening/Taimanov Opening)[/center][center]Position after 8.Bf1b5+[/center]

8...Nfd7

If [font color="red"]8...Nfd7 9.a4[/font] then:

If [font color="red"]9...0-0 10.Nf3 Na6 11.0-0[/font] then:

If [font color="red"]11...Nc7 12.Bd3 a6[/font] then:

[font color="red"]13.Nd2 Rb8 14.Nc4 Nf6 15.a5 Bd7 16.Qf3 Bb5 17.Bd2 Bxc4 18.Bxc4 b5 19.axb6 Rxb6[/font] gives White the advantage in space (Morgado-Lecroq, Corres, 1994).
[font color="darkorange"]13.Re1 Re8 14.Be3 Rb8 15.Bc2 b5 16.axb5 axb5[/font] is equal (Federau-Tringov, Op, West Berlin, 1985).

[font color="magenta"]11...Nb4 12.Re1 a6 13.Bf1 Re8 14.h3 b6 15.Be3 Bb7 16.Bf2 Rc8 17.Qd2 c4[/font] is equal (Ree-Hulak, IT, Wijk aan Zeem 1983).

[font color="darkred"]9...Qh4+ 10.g3 Qe7 11.Nf3 0-0 12.0-0 Na6 13.Re1 Nb4 14.Bf1 b6 15.Bc4 Bb7 16.Qb3 Rae8 17.Bd2 a6 18.Re2 Qd8 19.Rae1[/font] is equal (Lutikov-Vasiukov, Soviet Ch, Tbilisi, 1959).

9.Bd3 a6 10.a4 Qc7

If [font color="red"]10...Qh4+ 11.g3 Qd8 12.Nf3 0-0 13.0-0[/font] then:

If [font color="red"]13...Nf6 14.Kg2 Bg4 15.h3 Bxf3+ 16.Qxf3 Nbd7 17.Bd2[/font] then:

[font color="red"]17...Rc8 18.Bc4 Ne8 19.b3 Rb8 20.Qd3 Nc7 21.Ra2[/font] is equal (Akesson-K. Lie, IT, Malmö, 2008).
[font color="burgundy"]17...Qc7 18.b3 Rae8 19.Rae1 Re7 20.Re2 Rfe8[/font] is equal; Black's presure on e5 prevents White from advancing in the center (A. Tate-Gantar, Op, Pardubice, 2012).

If [font color="darkred"]13...Re8 14.Re1 Nf8[/font] then:

[font color="darkred"]15.Nd2 Nbd7 16.Nc4 Nb6 17.Ne3 Qc7 18.a5 Nbd7[/font] is equal (Vernay-Kristjansson, Op, Reykjavik, 2009).
[font color="magenta"]15.Kg2 Bg4 16.h3 Bxf3+ 17.Qxf3 Nbd7 18.Bd2 Rc8[/font] is equal (Timman-Pliester, Rotterdam, 1983).

If [font color="blue"]10...0-0 11.Nf3 Nf6 12.0-0[/font] then:

If [font color="blue"]12...Bg4 13.h3 Bxf3 14.Qxf3 Nbd7[/font] then:

If [font color="blue"]15.Be3 Re8[/font] then:

[font color="blue"]16.Bf2 Qa5 17.Kh1 Qb4 18.a5 b5 19.Rfb1 c4[/font] gives Black a small advantage in space (Kluger-Tringov, IT, Sofia, 1962).
If [font color="darkblue"]16.a5 Qc7 17.Kh1 c4 18.Bc2[/font] then:

If [font color="darkblue"]18...b5?! 19.axb6! Nxb6 20.e5[/font] then:

If [font color="darkblue"]20...Nfd7?[/font] then after [font color="darkblue"]21.e6! Nc5 22.f5 fxe6 23.fxg6 Rf8 24.Qh5[/font] White soon wins (Farago-Tringov, IT, Vrnjacka Banja, 1971).
[font color="darkcyan"]20...dxe5 21.fxe5 Rxe5 22.Bd4 Rae8 23.Bxe5 Rxe5 24.Rfd1[/font] gives White a strong position with the exchange for a pawn, but Black still has hope of counterplay.

[font color="dodgerblue"]18...Nh5 19.g4 Nhf6 20.Ba4 Re7 21.Bf2 Rf8 22.Bh4[/font] gives White the advantage in space.

If [font color="darkblue"]15.Bd2[/font] then after [font color="darkblue"]15...Re8 16.Bc4 Nh5 17.g4 Bd4+ 18.Kg2 Nhf6[/font] gives Black a small advantage in space (Leverett-Wojtkiewicz, Op, Chicago, 1989).
If [font color="dodgerblue"]15...Qc7 16.Bc4[/font] then:

If [font color="dodgerblue"]16...Nb6 17.b3 Nfd7 18.Rae1 Rae8 19.Qd3 Qd8[/font] then:

[font color="dodgerblue"]20.e5 dxe5 21.f5 e4 22.Nxe4 Bd4+ 23.Kh1 Ne5 24.Qc2[/font] leaves White threateing 25.Bh6!, winning the exchange (Pinter-Djuric, IT, Bajmok, 1980).
[font color="slateblue"]20.Kh1 Qh4 21.Re2 g5 22.g3 Qh5 23.Rg2 Nxc4 [/][/font is equal (Farago-Suetin, IT, Dubna, 1979).

[font color="darkcyan"]16...Rae8 17.Kh1 Nh5 18.Bd3 Bd4 19.a5 Ng7 20.Ra4[/font] is equal.

[font color="#0080FF"]12...Re8 13.Bd2 Qb6 14.a5 Qc7 15.b3 Ng4 16.h3[/font] is equal (McRae-Blaxall, NZ Jr, Aukland, 1985).

11.Nf3 c4 12.Bc2 0-0

If [font color="red"]12...Nc5[/font] then:

[font color="red"]13.0-0 Bg4 14.h3 Bxf3 15.Rxf3 Nbd7 16.h4 0-0[/font] is equal (C. Horvath-Piket, IT, Groningen, 1984).
[font color="darkred"]13.Be3 Bg4 14.0-0 0-0[/font] transposes into the notes to White's 14th move.

13.0-0 Nc5 14.Kh1!? (N)

If [font color="red"]14.Be3 Bg4[/font] then:

If [font color="red"]15.Bd4 Bxf3 16.Rxf3 Bxd4+ 17.Qxd4[/font] then:

[font color="red"]17...Nbd7 18.Ne2!? b5 19.h4 Qb6 20.a5 Qd8[/font] Houdini says Black has the advantage, my staff and I like White (Marsalek-Forintos, World ChT, Leningrad, 1960).
If [font color="darkred"]17...Qb6[/font] then:

If [font color="darkred"]18.a5!? Qxb2! 19.Ra2 Qb4 20.e5[/font] then:

[font color="darkred"]20...Nbd7!? 21.Rf1 b5[/font] then:

[font color="darkred"]22.Rb1 Nb3 23.Bxb3 Qc5 24.Qxc5 Nxc5 25.Bc2[/font] gives White the advantage (Szabo-Robatsch, IT, Mirabor, 1978).
[font coor="purple"]22.axb6[/font] trasnsposes into the [font color="darkorange"]orange line.[/font]

[font color="darkorange"]20...b5 21.axb6 Nbd7 22.Rf1 dxe5 23.fxe5 Qxb6 24.Rb1[/font] remains equal.

[font color="magenta"]18.Ne2 Nbd7 19.Rc3 a5 20.Rxc4 Na6 21.Rc1 Rfe8[/font] continues to give White a small advantage.

[font color="darkorchid"]15.Qe2 Nbd7 16.Qxc4 Bxf3 17.Rxf3 b5 18.Qe2 b4[/font] is equal.

14...Bg4

The game is equal.

15.h3!?

This is passive.
More active is [font color="red"]15.Qe2 Nb3 16.Bxb3 cxb3 17.h3 Bxf3 18.Qxf3[/font] with equality.

[center]BLACK: Natalia Zhukova[/center]

[center][/center]

[center]WHITE: Victoria Ni[/center][center]Position after 15.h2h3[/center]

15...Bxf3 16.Rxf3 Nbd7

[font color="red"]16...Qa5!? 17.Qf1! b5 18.Be3 Nbd7 19.axb5 Qb4 20.bxa6[/font] is equal.

17.Be3 b5 18.Bd4

[font color="red"]18.axb5 axb5 19.Nxb5 Rxa1 20.Qxa1 Qb6 21.Nc3 Rb8[/font] continues to give Wg=hite a slight edge.

18...Bxd4 19.Qxd4 Rab8 20.Ne2!?

White gives up some more space.
If [font color="red"]20.axb5! axb5 21.Re3 f6 22.Rg3 Qb6 23.h4 Ra8[/font] gives Black only a slight edge.

20...bxa4!?

Black fails to capitalize on White's inaccuracy and makes one of her own.
If [font color="red"]20...Rfe8 21.axb5[/font] then:

[font color="darkred"]21...Rxb5! 22.Rc3 Rxb2 23.Ng3 Qb8 24.Rxc4 Qb5[/font] gives Black a small advantage in space.
If [font color="darkred"]21...axb5!?[/font] then:

[font color="darkred"]22.Rfa3 Qb6 23.Ra7 f5 24.Qc3 fxe4 25.Nd4 Rf8[/font] is equal.
[font color="magenta"]22.Re3 Rb6 23.Rea3 Rb7 24.Ng3 Qb6 25.Kh2 Reb8[/font] is equal.

21.Ng3!

The game is equal.
[font color="red"]21.Bxa4 Rfe8 22.Ng3 Nxa4 23.Rxa4 Qc5 24.Rxc4 Qxd4 25.Rxd4[/font] is equal.

21...f6

If [font color="red"]21...Qb6 22.Nf5 f6 23.Ne7+[/font] then:

If [font color="red"]23...Kh8 24.Nc6 Qxb2 25.Qd1 Rb3 26.Rb1[/font] then:

[font color="red"]26...Qa2 27.Ra1 Qb2 28.Rb1 Qa3 29.Bxb3 axb3 30.e5[/font] is equal.
If [font color="darkred"]26...Qa3 27.Bxb3 axb3 28.e5 Qa2 29.Ra1[/font] then:

[font color="darkred"]29...Qb2 30.Rb1 Qa2 etc.[/font] draws.
[font color="magenta"]29...Qc2 30.Qxc2 bxc2 31.e6 Nb6 32.Rc3[/font] gives White a small advantage ad Black is about to lose most or all of her queenside pawns.

If [font color="darkred"]23...Kg7 24.Nc6 Qxb2[/font] then:

[font color="darkred"]25.Qd1 Rb3 26.Rb1 Qa2 27.Ra1 Qb2 28.Rb1 Qa2 etc.[/font] draws.
[font color="magenta"]25.Bxa4?! Nxe4! 26.Rfa3 Qxd4 27.Nxd4 Ndc5 28.Ne6+ Nxe6[/font] gives Black two extra pawns.

22.Qxc4!?

White allows Black's Rook to enter her position.
[font color="red"]22.Bxa4 Rb4 23.Bxd7 Qxd7 24.Ra2 Qb7 25.Rfa3 a5[/font] is equal.

[center]BLACK: Natalia Zhukova[/center]

[center][/center]

[center]WHITE: Victoria Ni[/center][center]Position after 22.Qd4c4:p[/center]

22...Rxb2!

Black takes a small advantage in space.

23.Bxa4 Nb6 24.Qc1

If [font color="red"]24.Qc3 Nbxa4 25.Rxa4[/font] then:

If [font color="red"]25...Rb3 26.Qa5 Rb1+ 27.Rf1 Rxf1+ 28.Nxf1 Rc8[/font] then:

[font color="red"]29.Qxc7 Rxc7 30.Ra1 Nxe4 31.Kh2 Ra7 32.Ra5 Nc5[/font] continues to give Black a small advantage in space.
If [font color="darkred"]29.Ra3?![/font] drops a pawn to [font color="darkred"]29...Qxa5! 30.Rxa5 Nxe4[/font] when:

[font color="darkred"]31.g4 Rc1 32.Kg2 Nc5.[/font]
If [font color="magenta"]31.Rxa6[/font] then [font color="magenta"]31...Rc1 32.Kg1 Nd2 33.Kf2 Rxf1+ 34.Ke2 Rxf4[/font] also gives Black an extra pawn.

If [font color="darkred"]25...Rfb8!? 26.Rc4! Qf7 27.e5 Qxd5[/font] then:

[font color="darkred"]28.exd6 R2b3 29.Rd4 Rxc3 30.Rxd5 Rxf3 31.gxf3 Nd7[/font] gives Black stronger pawns; White has the mote advanced passer while Black has the more remote passer.
If [font color="magenta"]28.exf6 Rb1+[/font] then [font color="magenta"]29.Kh2 R1b3 30.Qd4 Qxd4 31.Rxd4 Rxf3 32.gxf3 Rb2+[/font] continues to give Black a small advantage.
[font color="darkorange"]29.Nf1!? R1b3 30.Rd4 Rxc3 31.Rxd5 Rxf3 32.gxf3 Rb1[/font] gives Black stronger pawns.

24...Nbxa4 25.Rxa4 Qb6 26.Ra1 Rb8!?

Black allows White to strengthen her resistance by blasting away the center.
If [font color="red"]26...Rb4 27.Qc3 Rb3 28.Qc2 Rb4 29.Rff1 Qb7[/font] continues to give Black a small advantage in space.

27.f5!?

White fails to capitalize and allows Black to fix the e-pawn in a permanently backward position.
[font color="red"]27.e5! f5 28.exd6 Qxd6[/font] then:

[font color="red"]29.Nxf5 gxf5 30.Rg3+ Kf7 31.Qc3 Rb1+ 32.Kh2 Qxf4[/font] is equal.
[font color="darkred"]29.Qc3!? R2b3 30.Qe5 Qxe5 31.fxe5 Rxf3 32.gxf3 Nd3[/font] gives Black a slight edge.

27...g5!

Black still has a small advantage in space.

28.Qc3 Kf7 29.e5 dxe5

If [font color="red"]29...fxe5 30.f6 Qb7 31.Qe3 h6[/font] then:

[font color="red"]32.Nf5 Qxd5 33.Nxh6+ Kg6 34.Nf5 Qd2 35.Qxd2 Rxd2[/font] give Black an extra pawn, but White has the most advanced passer on the board.
If [font color="darkred"]32.Raf1?![/font] then:

[font color="darkred"]32...Qxd5! 33.Nf5 Kf8 34.Nxh6 Qd2 35.Qxd2 Rxd2[/font] is equal.
[font color="magenta"]32...Kf8 33.h4 Qxd5 34.hxg5 R2b3 35.Qc1 Rb1[/font] is equal.

30.d6?

White drops a pawn.
If [font color="red"]30.Rc1[/font] then:

[font color="red"]30...Rb1 31.Kh2 Rxc1 32.Qxc1 Qd6 33.Rc3 Rb5[/font] gives Black a small advantage in space.
If [font color="darkred"]30...Rb5 31.Qc4 Kf8 32.Rfc3 Nb3 33.Rd1 Rc5[/font] is equal.

[center]BLACK: Natalia Zhukova[/center]

[center][/center]

[center]WHITE: Victoria Ni[/center][center]Position after 30.d5d6[/center]

30...Qxd6!

Black has two extra pawns, both passed.

31.Qc4+ Kf8 32.Rc3 Rb1+

If [font color="red"]32...R8b5!? 33.Ne4![/font] then:

[font color="red"]33...Nxe4 34.Qxe4 a5 35.Rc6 Qd4 36.Rxf6+ Kg8 37.Re1[/font] gives BLack an extra (passed) pawn, but she must prove she can push it successfully.
If [font color="darkred"]33...Rb1+[/font] then:

[font color="darkred"]34.Kh2 Nxe4 35.Qc8+ Kg7 36.Rxa6 Rb7 37.Rxd6 Nxd6[/font] is equal.
[font color="magenta"]34.Rxb1!? Rxb1+ 35.Kh2 Nxe4 36.Qxe4 Qb8 37.Qc6 e4+[/font] gives Black two extra pawns, both passers.

33.Rxb1 Rxb1+ 34.Kh2 Rb5 35.Ne4

[font color="red"]35.h4 e4 36.hxg5 fxg5 37.Qe2 Qe5 38.Rc1 Qf4[/font] continues to give Black two extra pawns, both passed.

35...Nxe4 36.Qxe4 Rb4?

Perhaps in time pressure, Black opens the door for White to get back in the game.
If [font color="red"]36...Kg7 37.Qc6 Qxc6 38.Rxc6[/font] then:

If [font color="red"]38...e4 39.g4 a5 40.Rc7+ Kg8 41.Ra7 h5[/font] then:

Black wins after [font color="red"]42.Ra8+ Kf7 43.Ra7+ Kf8 44.Ra6 Ke7 45.Ra7+ Kd6.[/font]
[font color="burgundy"]41...Re5?! 42.Ra8+ Kf7 43.Kg1 e3 44.Kf1 h5 45.Ra7+ Re7[/font] continues to give Black two passed pawns.

If [font color="darkred"]38...a5 39.Ra6 h5[/font] then:

[font color="darkred"]40.g4 Rb2+ 41.Kh1 hxg4 42.Ra7+ Kf8 43.hxg4 Ra2[/font] gives Black two extra pawns, both passed.
[font color="magenta"]40.Ra7+!? Kf8 41.Ra6 Kg7 42.Ra7+[/font] allows Black to make no progress.

37.Rc8+?

Perhaps also in time trouble, White misses her last best chance.
[font color="red"]37.Rc6! Rxe4 38.Rxd6 Kg7 39.Rd7+ Kg8 40.Rd8+ Kg7[/font] allows Black no progress; she must either allow a draw by repetition or surrender one or both of he pawns on her third rank.

[center]BLACK: Natalia Zhukova[/center]

[center][/center]

[center]WHITE: Victoria Ni[/center][center]Position after 37.Rc3c8[/center]

37...Kg7! 38.Qc2

[font color="red"]38.Qc6 Qxc6 39.Rxc6 g4 40.hxg4 Rxg4 41.Rxa6 h5[/font] gives Black one extra pawn and White's f-pawn is deadwood.

38...e4+ 39.g3

If [font color="red"]39.Kh1 e3[/font] then:

If [font color="red"]40.Qc7+[/font] then Black wins after [font color="red"]40...Qxc7 41.Rxc7+ Kf8 42.Rc2 Re4 43.Re2 a5.[/font]
If [font color="darkred"]40.Qe2?? Rb1+![/font] leads to an ugly mate.

39...e3 40.Qc7+ Qxc7 41.Rxc7+ Kf8!?

Black again plays inaccurately, leaving the pawn unguarded.
If [font color="red"]41...Kh6[/font] then:

[font color="red"]42.Re7[/font] then Black wins after [font color="red"]42...Rb2+ 43.Kg1 g4 44.Rxe3 gxh3 45.Ra3 Kg5.[/font]
If [font color="darkred"]42.Kg2[/font] then Black wins after [font color="darkred"]42...Re4 43.Rc1 e2 44.Kf2 g4 45.h4 a5.[/font]

42.Kg2!

Instead of taking on h7, White moves her King to a position where it can take an active part in the defense.

42...Rb2+

Black is still winning, but the process is more difficult.
If [font color="red"]42...a5[/font] then:

[font color="red"]43.Kf3 h5 44.Ra7 a4 45.Kxe3 Rb3+ 46.Ke4 Rxg3[/font] continues to give Black an extra pawn.
If [font color="darkred"]43.Rxh7? Rb2+! 44.Kf3 e2 45.Kf2 a4[/font] gives White two advanced passers and an easy win.

43.Kf3 e2 44.Kf2 a5 45.Rxh7

White shortens her agony.
If [font color="red"]45.Rc6 Ke7 46.Ra6 Rb3[/font] then:

[font color="red"]47.h4 Re3 48.Ke1 Rxg3 49.Rxa5 h5 50.Ra7+ Kf8[/font] alows Black to sacrifice his passer for White's remaining pawns.
If [font color="darkred"]47.Kxe2?[/font] then Black wins after [font color="darkred"]47...Rxg3 48.h4 Rh3 49.Ra7+ Kf8 50.Ra8+ Kg7.[/font]

[center]BLACK: Natalia Zhukova[/center]

[center][/center]

[center]WHITE: Victoria Ni[/center][center]Position after 45.Rc7h7:p[/center]

45...a4!

White cannot stop both pawns.

46.Ra7 Ra2 47.h4

If [font color="red"]47.Ke1 a3 48.g4 Ke8[/font] then:

[font color="red"]49.Ra6[/font] then Black wins after [font color="red"]49...Ra1+ 50.Kxe2 a2 51.Kf2 Rh1 52.Ra8+ Kd7.[/font]
If [font color="darkred"]49.Ra8+[/font] then Black wins after [font color="darkred"]49...Ke7 50.Ra6 Ra1+ 51.Kxe2 a2 52.Kd2 Rh1.[/font]

47...gxh4 48.gxh4 a3 49.h5

If [font color="red"]49.Ra6 Kf7 50.Ra7+ Kg8[/font] then:

If [color="red"]51.Ra8+ Kg7 52.Ra7+ Kh6[/font] then:

If [font color="red"]53.Rf7 Rb2! 54.Rxf6+ Kh5[/font] then:

[font color="red"]55.Ra6[/font] then Black wins after [font color="red"]55...a2 56.Ra4 e1Q+ 57.Kxe1 Rb1+.[/font]
If [font color="darkorange"]55.Rf8[/font] then Black wins after [font color="darkorange"]55...a2 56.Rh8+ Kg4 57.Rg8+ Kf4 58.Re8 e1Q+.[/font]

If [font color="magenta"]53.Ra6[/font] then Black wins after [font color="magenta"]53...Kh5 54.Ra7 Kxh4 55.Ra4+ Kg5.[/font]

If [font color="darkred"]51.Ra4[/font] then Black wins after [font color="darkred"]51...Ra1 52.Kxe2 a2 53.Ra8+ Kg7.[/font]

49...Kg8 50.h6 Ra1 51.Kxe2 a2 0-1

If [font color="red"]52.Kd2[/font] then Black wins after the well-known tactical maneuver [font color="red"]52...Rh1.[/font]
Ms. Ni resigns.

Jack Rabbit

(45,984 posts)

8. C. Foisor (Romania) - Ju Wenjun (China), Round 6

Reply to Jack Rabbit (Reply #5)

Thu Apr 18, 2013, 08:32 PM

Apr 2013

In the absence of Hou Yifan and Zhao Xue, Ju Wengen played the top board for China.

Cristina Foiser, who played the top board for Romania, is the mother of Sabina Foiser, who played the fourth board for the United States.

[center][/center]

[center]Ju Wenjun[/center][font size="1"]Photo by Goran Urosevic in Wikimedia Commons (http://en.wikipedia.org/wiki/File:Ju_Wenjun_2008.jpg)
(Creative Commons License, Attribution/Share Alike)
[/font]

Cristina Foisor (Romania) - Ju Wenjun (China)
Women's World Team Championship, Round 6/Board 1
Astana, 9 March 2013

English Game: King's Indian Defense

1.c4 Nf6 2.g3 g6 3.Nc3 Bg7 4.Bg2 0-0 5.d3

[font color="red"]5.e4 d6 6.Nge2 c5 7.0-0 Nc6 8.d3 Rb8 9.a3 a6 10.Rb1 Bd7 11.b4 cxb4 12.axb4 b5 13.cxb5 axb5 14.h3 Ne8[/font] transposes to [font color="red"Danov-Bukic[/font] and [font color="burgundy"]Elikases-Dittmann[/font] in the notes to Black's ninth move.

5...d6 6.e4 c5 7.Nge2 Nc6 8.a3

If [font color="red"]8.0-0[/font] then:

If [font color="red"]8...a6 9.h3 Rb8 10.a4 Ne8 11.Be3[/font] then:

If [font color="red"]11...Nc7 12.d4 cxd4 13.Nxd4[/font] then:

If [font color="red"]13...Ne6 14.Nde2[/font] then:

If [font color="red"]14...Nc5 15.Rb1 Nb4 16.b3 Bd7[/font] then:

[font color="red"]17.Qd2 b5 18.axb5 axb5 19.Nxb5 Bxb5 20.Qxb4 Bc6[/font] gives Black a slight edge with better minor pieces and the initiative (Koshy-Matta, Indian Ch, Mumbai, 2009).
[font color="burgundy"]17.Nd5 Nxd5 18.exd5 b5 19.axb5 axb5 20.b4[/font] gives White a small advantage in space, concentrated on the queenside (Bejtovic-Hristodoulou, Euro Ch, Plovdiv, 2012).

If [font color="darkred"]14...Bd7[/font] then:

If [font color="darkred"]15.Rb1 Na5 16.b3 b5 17.cxb5 axb5 18.axb5 Bxb5[/font] then:

If [font color="darkred"]19.Nxb5 Rxb5 20.b4 Nc4[/font] then:

[font color="darkred"]21.Qd3 Nxe3 22.Qxb5 Nxf1 23.Bxf1 Qc7[/font] is equal (R. R. Griffiths-Y. F. Zhou, British Ch, Sheffield, 2011).
[font color="burgundy"]21.Bd4 Nxd4 22.Nxd4 Rb6 23.Qd3 Ne5[/font] is equal.

If [font color="magenta"]19.Re1 Bxe2 20.Nxe2[/font] then:

[font color="magenta"]20...Qd7 21.Nf4 Bc3 22.Re2 Nxf4 23.Bxf4 Qe6[/font] is equal (Harika-E. Berg, Op, Gibraltar, 2011).
[font color="darkorange"]20...Nc6 21.Rc1 Qe8 22.h4 Qd7 23.Bh3 Qb7[/font] gives Black a slight initiative in the threat to win the c-pawn.

If [font color="magenta"]15.f4[/font] then:

[font color="magenta"]15...Nc5 16.e5 Be6 17.Nd5 b6 18.exd6 exd6[/font] gives Black a small advantage in space (Zahilas-Kontronias, Op, Ano Liosa, Greece, 1997).
If [font color="darkorange"]15...Na5 16.b3 b5 17.axb5 axb5[/font] then:

[font color="darkorange"]18.Rb1?! bxc4! 19.b4 Nb3 20.Nd5 Bc6 21.f5 Nc7[/font] give Black a great advantage; White's pawn at b4 rests on flimsy support and Black's Knight at b3 will be difficult to dislodge (Jacko-Lach, TT, Liptovsky Mikulas, 2011).
[font color="purple"]18.f5 Nc5 19.Rb1 Ncxb3 20.Rxb3 b4 21.Nd5 Ba4[/font] gives Black the edge as he wins the exchange.

[font color="burgundy"]13...Bd7 14.a5 Ne6 15.Nb3 Ne5 16.Nd2 Nd3 17.Qb1 Nec5[/font] gives Black a small advantage in space (Romanishin-P. Popovic, IT, Sarajevo, 1984).

If [font color="darkred"]11...Nd4 12.Rb1[/font] then:

If [font color="darkred"]12...Bd7 13.b4[/font] then:

If [font color="darkred"]13...Nxe2+ 14.Nxe2 cxb4 15.Rxb4 b5[/font] then:

If [font color="darkred"]16.axb5 16...axb5 17.cxb5[/font] then:

[font color="darkred"]17...Rxb5 Ba6 18.Rfd1 Ne6 19.dxc5 dxc5 20.Qxd8 Rxd8 21.Nf4 Nd4[/font] draw (Manor-Piket, World Jr Ch, Adelaide, 1988).
[font color="darkorange"]17.axb5 axb5 18.Ba7 Rb7 19.Bd4 Bxd4 20.Nxd4[/font] remains equal.

[font color="purple"]17.dxc5 dxc5 18.Nc3 Ra5 19.Qc1 Be6 20.b4 cxb4[/font] is equal (Solak-Macieja, Kostic Mem, Vrsac, 2006).

If [font color="magenta"]16.Qb1 Nc7[/font] then:

If [font color="magenta"]17.Ba7!? Rb7![/font] (Black has an edge in space) [font color="magenta"]18.Be3[/font] then:

If [font color="magenta"]18...Rb8[/font] then:

If [font color="magenta"]19.Rc1?! bxa4![/font] (Black has an extra pawn, command of the long diagonal; even though White has two heavy pieces in the b-file, she cannot win control of it) [font color="magenta"]20.Bb6[/font] then:

[font color="magenta"]20...a5?! 21.Bxa5! Rxb4 22.Qxb4 Na6[/font] gives Black a small advantage (Solk-Leventic, Bosian ChT, Vogosca, 2007).
[font color="burgundy"]20...Qc8 21.d4 Na8 22.c5 Nxb6 23.cxb6 Qd8[/font] continues to give Black an impressive advantage.

[font color="#D0C020"]19.axb5! axb5 20.Ba7 Rb7 21.Bd4 Bxd4 22.Nxd4[/font] is equal.

[font color="purple"]18...a5 19.Rxb5 Nxb5 20.cxb5 Rb8 21.Qc2 Be6[/font] continues to give Black an edge with an extra pawn that happens to be a passer.

[font color="burgundy"]13...cxb4 14.Rxb4 Qa5 15.Qb1 Nc2 16.Rxb7 Rxb7 17.Qxb7[/font] remains equal (Azmaiparashvili-Chekhov, Soviet Ch, Riga, 1980).

If [font color="magenta"]12...Nxe2+ 13.Nxe2 b5[/font] then:

If [font color="magenta"]14.axb5 axb5 15.cxb5 Rxb5 16.d4 Nc7[/font] then:

[font color="magenta"]17.Qd2 18.Rxb5 Bxb5 19.Qb3 Bd7 20.Rc1 Nf6 21.d4[/font] is equal (D. Byrne-E. Nikolic, IT, Vinkovci, 1968).
[font color="burgundy"]17...Qa5 18.Qb3 Rxb5 19.Rxb5 Qxb5 20.Rb1 Qxb3 21.Rxb3 Nf6[/font] draw (Mochalov-Timoshchenko, Soviet ChT, Podolsk, 1990).

[font color="darkorange"]14.cxb5 axb5 15.b4 bxa4 16.Qxa4 Bd7 17.Qa3 Ra8[/font] is equal (Lee Sanghoon-Chumfwa, Ol, Istanbul, 2012).

[font color="darkorchid"]8...Ne8 9.Be3[/font] transposes into the notes to Black's eighth moves.

8...Rb8

If [font color="red"]8...Ne8[/font] then:

If [font color="red"]9.Be3 Nc7 10.Rb1 a5 11.0-0[/font] then:

If [font color="red"]11...Ne6 12.Nb5[/font] then:

If [font color="red"]12...Ned4 13.Nbxd4 cxd4 14.Bc1[/font] then:

[font color="red"]14...Bd7 15.f4 f5 16.b3 Qb6[/font] draw (R. Byrne-Reshevsky, US Ch, New York, 1958).
[font color="burgundy"]14...a4 15.b4 axb3 16.Qxb3 Qa5 17.h3 Kh8 18.f4[/font] is equal (Christoph-Keene, IT 6566, Hastings, 1966).

If [font color="darkred"]12...Ncd4[/font] then:

[font color="darkred"]13.Nbxd4 Nxd4 14.Nxd4 Bxd4 15.Bxd4 cxd4 16.Qc1[/font] gives White the edge with slightly stronger pawns (R. Taylor-Mycroft, British Ch, Scarborough, 2004).
[font color="magenta"]13.a4 Bd7 14.Nec3 Nxb5 15.axb5 Nd4 16.Ne2 Nxe2+[/font] is equal (Filip-Kupka, Czech Ch, Luhacovice, 1968).

If [font color="darkred"]11...Nd4 12.b4 axb4[/font] then:

If [font color="darkred"]13.axb4 b6[/font] then:

[font color="darkred"]14.bxc5 bxc5 15.Qc1 Re8 16.Bh6 Nxe2+ 17.Nxe2 Bh8[/font] is equal (Evans-Fischer, US Ch, New York, 1966).

[font color="magenta"]14.e5 Ra3 15.exd6 Nxe2+ 16.Qxe2 exd6 17.Ne4 Ne6[/font] is equal (Genba-Korotylev, Russian ChU18, Moscow, 1995).

[font color="darkorchid"]9.Rb1 a5 10.0-0 Nc7 11.Nb5 Ne6 12.Be3[/font] transposes to the [font color="red"]main line.[/font]

9.Rb1 b6 (N)

If [font color="red"]9...a6 10.b4[/font] then:

If [font color="red"]10...cxb4 11.axb4 b5 12.cxb5 axb5[/font] then:

If [font color="red"]13.h3 Bd7 14.0-0 Ne8 15.Kh2 Nc7[/font] then:

[font color="red"]16.Bd2 Ne6 17.Nd5 Ned4 18.Nxd4 Nxd4 19.f4 Ra8[/font] leaves Black with better Bishops and a Rook on an open file (Danov-Bukic, IT, Skopje, 1967).
[font color="burgundy"]16.d4 Na7 17.d5 Nc8 18.Be3 Nb6 19.Bd4 Ne8[/font] is equal (Elikases-Dittmann, Ol, Munich, 1958).

If [font color="darkred"]13.0-0 e5 14.h3 Be6[/font] then:

[font color="darkred"]15.f4 exf4 16.gxf4 Qb6+ 17.Kh1 Ne7 18.f5 Bc8[/font] is equal (J. Gonsales-Hatanbaatar, Zonal, Manila, 2001).
[font color="magenta"]15.Nd5 Ne7 16.Nxe7+ Qxe7 17.f4 exf4 18.Nxf4 Nd7[/font] gives Black a small advantage in space (Smyslov-Taimanov, Soviet Ch, Baku, 1961).

[font color="darkred"]a) 10...b6 11.0-0 Na7 12.b5 a5 13.h3 Bb7 14.Bg5[/font] is equal (Heedt-Kleinhenz, Op, Biel, 2001).
[font color="magenta"]b) 10...b5 11.cxb5 axb5 12.0-0 cxb4 13.axb4 e5[/font] is equal (Miezis-Sharavdorj, Wotulo Mem, Djakarta, 2001).

10.b4

The game is equal. White has more space, but if she tries to press forward her position will crumble before Black's solid defense.

10...Bb7 11.0-0 e6

[font color="red"]11...Qc7 12.Bg5 e6 13.Qd2 Ne8 14.Bf4 a6 15.Rfc1[/font] remains equal.

12.h3 Qe7 13.f4

[font color="red"]13.b5 Nd8 14.Bg5 Qc7 15.Qd2 Ne8 16.Bh6 f5[/font] remains equal.

13...Nd7

[font color="red"]13...Ne8 14.Qa4 Qd7 15.Nd1 Bh8 16.f5 exf5 17.exf5[/font] remains equal.

14.Kh2 a6 15.bxc5

[font color="red"]15.b5 Nd4 16.Nxd4 Bxd4 17.bxa6 Bxc3 18.axb7 Rxb7[/font] remains equal.

15...bxc5 16.Bb2!?

After putting her Rook on an open file, White obstructs its scope with the Bishop.
Better is [font color="red"]16.Bd2 Rfe8 17.Qa4 Rec8 18.Qc2 Nd8 19.f5 Ba8[/font] with equality.

[center]BLACK: Ju Wenjun[/center]

[center][/center]

[center]WHITE: Cristina Foisor[/center][center]Position after 16.Bc1b2[/center]

16...Nd4!

Black has a slim edge in space.

17.Nxd4 cxd4 18.Ne2

If [font color="red"]18.Na2!?[/font] then:

[font color="red"]18...Nc5! 19.Ba1 Bc6 20.Rf2 Rxb1 21.Qxb1 Qc7[/font] gives Black a small advantage; Rf8b8 will force White to give up the b-file.
If [font color="darkred"]18...a5![/font] then:

[font color="darkred"]19.Qd2 Nc5! 20.Ba1 f5 21.exf5 Bxg2 22.Kxg2 gxf5[/font] gives Black more space and freedom.
[font color="magenta"]19.h4?! Nc5 20.Nc1 f5 21.exf5 Bxg2 22.Kxg2 Qb7+[/font] gives Black more space and freedom and command of open lines.

18...e5 19.f5!?

This move weakens White's center, allowing Black to penetrate into White's position by the dark squares.
If [font color="red"]19.a4 Bc6 20.a5 Rfc8 21.Ba3 Rxb1 22.Qxb1 Rb8[/font] gives Black the advantage owing to her cammand of the b-file and the potential of landing her Knight at c5.

19...Bc6! 20.Qd2

If [font color="red"]20.a4 a5[/font] then:

If [font color="red"]21.Ba3 Rxb1 22.Qxb1 Rb8[/font] then:

[font color="red"]23.Qa2 Bxa4 24.h4 Bb3 25.Qd2 a4 26.Bh3 Nc5[/font] gives Black an extra pawn and a healthy advantage in space.
[font color="magenta"]23.Qc2 Nb6 24.Rb1 Qf8 25.Ra1 Nxa4 26.Qc1 Bh6[/font] gives White an extra pawn, more space and a slight initiative.

[font color="darkred"]21.Qd2 Rb4 22.Ba3 Rxa4 23.Ra1 Rb8 24.Qc2 Bh6[/font] gives Black an extra pawn; White will concentrate on protecting her d-pawn, which is the keystone of her center pawns.

20...Rb7

If [font color="red"]20...Nc5[/font] then:

If [font color="red"]21.a4 Nb3[/font] then:

If [font color="red"]22.Qd1 gxf5 23.exf5 Bxa4[/font] then:

[font color="red"]24.Ba3 Qf6 25.Ng1 Bh6 26.Qg4+ Kh8 27.Nf3 a5[/font] gives Black a small advantage with a weak extra pawn and a small advantage in space.
If [font color="darkred"]24.Nc1?! Nc5[/font] then:

[font color="darkred"]25.Qe2 Qf6 26.Ra1 Bd7 27.Ba3 Rb6 28.Qh5 Bh6[/font] gives White an extra pawn, a better center, an attack on White's important d3 pawn and more space; although a Black win is still problematic, White has no room for error.
If [font color="magenta"]25.Qd2? Qf6! 26.Ra1 Bh6 27.Qe2 Bd7 28.Ba3 Rb6[/font] gives Black an extra pawn, a better center and more space.

[font color="burgundy"]22.Qc2 Bxa4 23.Nc1 Nc5 24.Qe2 Bh6 25.Ra1 Bd7[/font] gives Black an extra pawn and the advantage in space.

If [font color="darkred"]21.Nc1?! gxf5[/font] then:

If [font color="darkred"]22.Rxf5 Bd7[/font] then:

If [font color="darkred"]23.Rf2 Qe6 24.g4 Qg6[/font] then:

If [font color="darkred"]25.Na2 Bh6 26.Qe2 Be3[/font] then:

[font color="darkred"]27.Rf3 a5 28.Rbf1 Nxd3 29.Bxd4 exd4 30.Qxd3 Rb2[/font] forces the Knight to flee to c3 where 31...Rb3 pins it to the Queen.
[font color="#D0C020"]27.Rff1 a5 28.Nc1 Qh6 29.Qd1 Rb6 30.Kh1 Na4[/font] threatens 31...Nc3!, winning material.

If [font color="purple"]25.Qe2 Bh6 26.Rf1 a5 27.Na2 Be3 28.Rf3 Qh6![/font] wins material.

If [font color="darkorange"]23.Rh5 Rb7 24.Ra1 Rfb8 25.Ra2 Na4 26.Ba1 Qf6[/font] leaves White no effective defense against 26...Rb1!.

If [font color="magenta"]22.exf5[/font] then Black wins after [font color="magenta"]22...Bxg2 23.Qxg2 Rb6 24.Rf2 Qb7 25.Qf1 Bh6.[/font]

21.Rbe1?

White wants to preserve her pieces and rightly doesn't think Black will sacrifice the exchange on b2.
Nevertheless, White would have done better to move the Bishop first since Black wasn't about to exchange Rooks and surrender the b-file to White.
If [font color="red"]21.Ba1[/font] then:

If [font color="red"]21...Nc5 22.Rb4 a5[/font] then:

If [font color="red"]23.Rxb7 Qxb7 24.f6![/font] (the Bishop is entombed) [font color="red"]24...Bh8[/font] then:

If [font color="red"]25.Rf3 Qb1[/font] then:

[font color="red"]26.Nxd4 exd4 27.Bxd4 Nb3 28.Qf2 Nxd4 29.Qxd4 Qb8[/font] gives Black a safer King against White's extra pawn and overall better pawn structure; Black's extra piece is never going to get out of prison, so it doesn't count at all.
[font color="burgundy"]26.Bxd4 exd4 27.Nxd4 Bd7 28.Qf4 Qb6 29.g4 a4[/font] gives Black more freedom, but both sides have problems in that department; Black's dark-bound Bishop is permanently sidelined.

If [font color="darkred"]25.g4 a4[/font] then:

If [font color="darkred"]26.g5 Rb8[/font] then:

[font color="darkred"]27.Re1 Bd7 28.Nxd4 exd4 29.Bxd4 Qc7 30.e5 h6[/font] gives White two extra pawns, but her King is vulnerable to attack.
If [font color="darkorange"]27.Rd1[/font] then Black wins after [font color="darkorange"]27...Bd7 28.Nc1 Qb1 29.Na2 Qb3 30.Nb4 Qxa3.[/font]

If [font color="magenta"]26.Bb2[/font] then Black wins after [font color="magenta"]26...Rb8 27.Bc1 Qb3 28.Rf3 Qb1 29.h4 Bd7.[/font]

[font color="burgundy"]23.Rb2 Rxb2 24.Bxb2 Rb8 25.fxg6 hxg6 26.Nc1[/font threatens the Bishop; White does not have enough force available for its defense at b2.

If [font color="darkred"]21...Rxb1 22.Rxb1[/font] then:

If [font color="darkred"]22...gxf5 23.exf5 Bxg2 24.Kxg2 d5 25.Qb4[/font] then:

[font color="darkred"]25...Qg5 26.Rd1 Qxf5 27.cxd5 Rc8 28.Qb1 Nf6[/font] gives Black a stronger center and attacks two weak pawns.
[font color="burgundy"]25...Qxb4?! 26.axb4! Rb8 27.Nc1 Bf8 28.b5 a5[/font] still gives Black a better center and a slight edge in space, but White has counterplay on the queenside.

If [font color="magenta"]22...Nc5 23.fxg6 hxg6[/font] then:

If [font color="magenta"]24.Ng1 f5 25.exf5 Bxg2 26.Kxg2 Rxf5 27.Nf3 Qd8[/font] gives Black the actyive Knight and Rook; White has the better Bishop.
If [font color="darkorange"]24.Nc1?[/font] then:

If [font color="darkrorange"]24...f5! 25.Qe2 fxe4 26.dxe4 Bh6[/font] then:

[font color="darkrorange"]27.Nd3 Nxd3 28.Qxd3 Rf2 29.Rb6 Qc7 30.Rb2 Qf7[/font] allows Black to decisively invade White's kingside.
If [font color="purple"]27.Nb3[/font] then Black wins after [font color="purple"]27...Qb7 28.Nd2 Qa8 29.Rb2 Bxd2 30.Qxd2 Bxe4.[/font]

[font color="#D0C020"]24...Kh7?! 25.Qd1! Bh6 26.Na2 Ba4 27.Qe2 Qg5[/font] misses the win, though Black has a strong game.

[center]BLACK: Ju Wenjun[/center]

[center][/center]

[center]WHITE: Cristina Foisor[/center][center]Position after 21.Rb1e1[/center]

21...Rfb8!

Black doesn't sacrifice the exchange, but she can win a tempo by threatening to sacrifice the Bishop in just this way.

21...Nc5!

22.Nc1 Rfb8 23.Ba1 gxf5 24.exf5 Bxg2 25.Qxg2

22.Bc1

If [font color="red"]22.Ba1 Nc5[/font] then:

[font color="red"]23.h4 Rb3 24.fxg6 Rxd3 25.gxf7+ Qxf7 26.Qa5 Qd7[/font] leaves White with a weak center.
If [font color="darkred"]23.Nc1 gxf5 24.exf5 Bxg2[/font] then:

[font color="darkred"]25.Qxg2 Qf6 26.Rd1 Rb1 27.Na2 Rxd1 28.Rxd1 a5[/font] leaves White's position full of exploitable pawn weaknesses; Black should win easily.
[font color="magenta"]25.f6 Bxf6 26.Qxg2 Qd8 27.Qf3 Bg7 28.Rd1 Qf8[/font] gives Black an extra pawn and more activity; Black Knight at c5 is dominant.

22...Nc5 23.Ng1

If [font color="red"]23.fxg6 hxg6[/font] then:

If [font color="red"]24.Ng1 Rb3[/font] then:

[font color="red"]25.Rf3 f5 26.h4 Rc3 27.Ref1 fxe4 28.dxe4 Nxe4[/font] gives Black an extra pawn and threats deep in the heart of White's position.
If [font color="burgundy"]25.Re2[/font] then after [font color="burgundy"]25...Rxd3 26.Qa2 Rbb3 27.Rb2 Qe6[/font] Black wins easily.

If [font color="darkred"]24.Rf3 Rb1 25.Bh1 Nb3[/font] then:

If [font color="darkred"]26.Qc2[/font] then Black wins after [font color="darkred"]26...Nxc1 27.Rxc1 R1b2 28.Qd1 Bh6 29.Ra1 f5[/font] gives Black command of vital attacking lines and stronger pawns.
[font color="magenta"]26.Qd1 Nxc1 27.Nxc1 Bh6 28.Ref1 R8b2+ 29.R3f2 Rxf2+![/font] wins the Knigt at c1.

23...Rb3

Black intends to undermine White's center by striking at the keystone pawn at d3.

24.fxg6 hxg6 25.Rf3 f5 26.h4

[font color="red"]26.exf5 Qf6 27.Rff1 Rxd3 28.Qa2 Bxg2 29.Qxg2 gxf5[/font] gives Black an extra pawn and an advanced passer.

26...Rc3 27.Nh3

If [font color="red"]27.Ref1 fxe4 28.dxe4 Nxe4[/font] then:

[font color="red"]29.Qa2 d3 30.c5+ Kh8 31.Rf7 Qe8 32.Bxe4 Bxe4[/font] gives Black an advanced passed pawn and the deadly threat of theat 33...Rc2+!.
[font color="darkred"]29.Qe2 Qe6 30.h5 Rxf3 31.Bxf3 Nc3 32.Bg4 Qe8[/font] gives Black an extra pawn.

27...Nb3?!

White not throwing away the win, Black makes her task more difficult.
If [font color="red"]27...Rbb3! 28.exf5[/font] then:

[font color="red"]28...Nxd3! 29.Ng5 Bf6 30.Rxd3 Rxd3 31.Qf2 Bxg2 32.Qxg2 gxf5[/font] gives Black an extra pawn and active Rooks.
If [font color="darkred"]28...Bxf3 29.Bxf3 Rxd3[/font] then:

If [font color="darkred"]30.Bd5+ Kh8 31.Qf2 Rxg3 32.Ng5 e4[/font] then:

If [font color="darkred"]33.Bf4 Rgf3 34.Nxf3 Nd3[/font] then:

[font color="darkred"]35.Bg5 Qe8 36.Qa2 Nxe1 37.Nxe1 Qe5+ 38.Kg1 Qg3+[/font] gives Black an extra pawn and active heavy pieces.
[font color="purple"]35.Rxe4 Qxe4 36.Bxe4 Nxf2 37.Bd5 gxf5 38.c5 Rb5[/font] gives Black an extra Rook.

If [font color="darkorange"]33.Nf7+[/font] then Black wins after [font color="darkorange"]33...Qxf7 34.Bxf7 Rh3+ 35.Kg2 Be5 36.Bf4 Nd3.[/font]

[font color="magenta"]30.Qg5 Kf8 31.Qxe7+ Kxe7 32.Bd1 Rbc3 33.Bg5+ Bf6[/font] leaves White up by a clear exchange with two active Rooks.

28.Qg5!?

White fasils to find a move that give Black any problems.
[font color="red"]28.Qb2! Qc7 29.Bd2 Nc5 30.Qa2 Rxd3 31.Rxd3 Nxd3[/font] still gives Black a winning position, but it will take her longer to grind down White.

[center]BLACK: Ju Wenjun[/center]

[center][/center]

[center]WHITE: Cristina Foisor[/center][center]Position after 28.Qd2g5[/center]

28...Qxg5!

Black's position is so dominant that she can exchange Queens without diminishing her advantage.

29.Bxg5 Nc5

Black eyes the base of White's defense.

30.exf5

If [font color="red"]30.Nf2 Rxa3[/font] then:

If [font color="red"]31.g4 fxe4 32.dxe4 Rxf3 33.Bxf3[/font] then [font color="red"]33...a5![/font] announces a new winning motif for Black.
If [font color="darkred"]31.Be7 fxe4 32.dxe4 Rxf3 33.Bxf3 Bf8 34.Bf6[/font] then Black again wins after playing [font color="darkred"]34...a5!.[/font]

30...Bxf3 31.Bxf3 Rb2+ 32.Kg1 e4

Black just needs to find an adequate move to win, not necessarily the best move.
Stronger is [font color="red"]32...Rxd3![/font] then:

[font color="red"]33.Bc1 Rc2 34.Bd5+ Kh8 35.Kf1 Rxg3 36.Ng5 gxf5[/font] gives Black two extra pawns.
If [font color="darkred"]33.Bd5+ Kf8 34.Kf1 Rxg3[/font] then:

[font color="darkred"]35.Bc1 Rc2 36.Bg5 gxf5 37.Nf4 Rxg5 38.hxg5 exf4[/font] gives Black two extra pawns.
[font color="magenta"]35.Nf2 gxf5 36.Bg2 f4 37.Bf6 Rxa3 38.Bxg7+ Kxg7[/font] gives Black three extra pawns.

33.Bxe4 Nxe4 34.Rxe4

[center]BLACK: Ju Wenjun[/center]

[center][/center]

[center]WHITE: Cristina Foisor[/center][center]Position after 34.Re1e4:N[/center]

34...Rxd3

Even stronger is [font color="red"]34...Be5 35.Nf2 gxf5[/font] when:

If [font color="red"]36.Re1 Bxg3 37.Nd1 Rb1[/font] then:

[font color="red"]38.Rf1 Rxd3 39.Nf2 Rxf1+ 40.Kxf1 Rxa3[/font] gives Black the exchange and two extra pawns.
If [font color="magenta"]38.Re8+[/font] then Black wins after [font color="magenta"]38...Kf7 39.Re7+ Kf8 40.Kg2 Rxd3.[/font]

If [font color="darkred"]36.Nd1[/font] then Black wins after [font color="darkred"]36...fxe4 37.Nxb2 e3 38.Kf1 Rc1+.[/font]

35.Nf2

No better is [font color="red"]35.Re8+ Kf7 36.Re7+ Kf8 37.Nf2 Rxg3+ 38.Kf1 Rxg5[/font] when Black is a whole Rook to the good.

35...Rxg3+ 36.Kf1 gxf5 37.Rf4 d3

No worse is [font color="red"]37...Rb1+ 38.Ke2 Re3+ 39.Kd2 Rb2+ 40.Kc1 d3.[/font]

38.Nd1

If [font color="red"]38.Nxd3[/font] then Black wins after [font color="red"]38...Rxd3 39.Rf2 Rxf2+ 40.Kxf2 Rxa3.[/font]

38...Rb1 39.Kf2 Rxd1 0-1

[font color="red"]40.Rxf5 Rdg1 41.Rd5 R1g2+ 42.Kf1 Rc2 43.Rxd6 Rf3+[/font] leads to mate.
Dna. Foisor resigns.

Jack Rabbit

(45,984 posts)

9. Tan Zhongyi (China) - Dinara Saduakassova (Kazakhstan), Round 7

Reply to Jack Rabbit (Reply #5)

Thu Apr 18, 2013, 08:34 PM

Apr 2013

[center][/center]

[center]There is no photo of Tan Zhongyi available with an internet-friendly copyright[/center][font size="1"]Photo by Jon Sullivan from public-domain-photos[/a.com
(Public Domain)
[/font]

Tan Zhongyi (China) - Dinara Saduakassova (Kazakhstan)
Women's World Team Championship, Round 7/Board 3
Astana, 10 March 2013

East India Game: Nimzo-Indian Defense (Spassky Opening)

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 b6 5.Bg5

Before becoming world champion in 1969, Boris Spassky won a number of games with this debut. One book I had published in the seventies called this the "Spasski Variation," but common practice nowadays is to assign it the name of Spassky's home town, Leningrad. As far as we are concerned, Leningrad is a variation of the Dutch Defense.

5...Bb7 6.e3 h6 7.Bh4 0-0 8.Bd3 Be7 9.Qe2 (N)

[font color="red"]9.0-0 Nh5 10.Bxe7 Qxe7 11.Nd2 Nf6 12.e4 d6[/font] is equal (S. Atalik-Zelic, Bosnian ChT, Neum, 2005).

9...d6!?

White has a slight advantage in space.
[font color="red"]9...c5 10.dxc5 bxc5 11.Bc2 Bxf3 12.Qxf3 Nc6 13.0-0[/font] is equal.

10.0-0-0!?

The King will be safer on the kingside.
[font color="red"]10.0-0 c5 11.h3 Qc7[/font] then:

If [font color="red"]12.Nd2 cxd4 13.exd4[/font] then:

[font color="red"]13...d5 14.Bxf6 Bxf6 15.cxd5 Bxd5 16.Nxd5 exd5 17.Rac1[/font] gives White a slight advantage.

[font color="magenta"]13...Qd7 14.Rfe1 d5 15.Nf3 dxc4 16.Bxc4 g5 17.Bg3[/font] gives White a small advantage in space.

[font color="darkred"]12.Nb5 Qd8 13.dxc5 bxc5 14.Bxf6 Bxf6 15.Rfd1[/font] gives White a slight advantage in space.

[center]BLACK: Darina Saduakassova[/center]

[center][/center]

[center]WHITE: Tan Zhongyi[/center][center]Position after 10.0-0-0[/center]

10...c5!

The game is equal.
[font color="red"]10...Na6 11.Kb1 Nb4 12.Ka1 Nxd3 13.Qxd3 Nd7 14.Bxe7 Qxe7[/font] is equal.

11.Rhg1!?

White reveals her plan: she castles on the queenside in order to launch a kingside attack. However, the plan is a little slow and White's King position is slightly vulnerable.
If [font color="red"]11.Kb1 Nc6 12.Ka1[/font] then:

[font color="red"]12...Ne8 13.Bxe7 Nxe7 14.Bb1 a6 15.Qd3 Nf6 16.Rhg1[/font] remains equal.
If [font color="darkred"]12...Na5[/font] then:

[font color="darkred"]13.Bb1 cxd4 14.Rxd4 Ne8 15.Qd3 f5 16.Bxe7 Qxe7 17.Qe2[/font] is equal.
If [font color="magenta"]13.Rhg1 cxd4 14.Nxd4 d5 15.f4[/font] then:

[font color="magenta"]15...Re8 16.cxd5 Nxd5 17.Nxd5 Bxd5 18.Be1 Qc8 19.g4[/font] gives White a small advantage in space.
If [font color="darkorange"]15...dxc4 16.Bb1 Qe8 17.g4[/font] then:

[font color="darkorange"]17...Nd5 18.Nxd5 Bxd5 19.Bxe7 Qxe7 20.g5 h5 21.Qxh5[/font] gives White an impressive advantage on the kingside.
[font color="purple"]17...g6 18.Nxe6 fxe6 19.Bxg6 Qxg6 20.g5 hxg5 21.Rxg5[/font] wins Black's Queen for a Rook and a minor piece; White also holds an extra pawn.

11...cxd4!?

Black should complete her development before undertaking aggressive action in the center.
If [font color="red"]11...Nbd7![/font] then:

[font color="red"]12.Bc2 d5 13.Bxf6 Nxf6 14.Kb1 dxc4 15.Qxc4 Qb8[/font] gives Black a small advantage in space.
[font color="darkred"]12.Kb1 d5 13.cxd5 Nxd5 14.Nxd5 Bxd5 15.Bg3 a6[/font] is equal.

If [font color="blue"]11...Nc6!? 12.g4[/font] then:

[font color="blue"]12...g6 13.Bxf6 Bxf6 14.Be4 cxd4 15.Bxc6 Bxc6 16.Nxd4[/font] is equal.
If [font color="darkblue"]12...g5!? 13.dxc5[/font] then:

[font color="darkblue"]13...bxc5 14.Bg3 Ne8 15.Bb1 Kg7 16.Nd2 Qb6 17.f4[/font] gives White an extra pawn and Black a little more space.
If [font color="dodgerblue"]13...d5?[/font] then White wins after [font color="dodgerblue"]14.Nxg5! hxg5 15.Bxg5 Nd7 16.Bxe7 Nxe7 17.g5.[/font]

12.exd4!

The game is equal.
If [font color="red"]12.Nxd4[/font] then:

[font color="red"]12...d5 (13.Kb1 Bb4 14.Na4 Nc6 15.Bc2 Nxd4 16.Rxd4[/font] is equal.

12...Nbd7 13.g4 Rc8 14.g5 hxg5 15.Bxg5 Ne5 16.Bc2

12...d5 13.g4!?

It's White's turn to be overanxious. There is time to first shelter the King.
If [font color="red"]13.Kb1[/font] then:

If [font color="red"]13...Nbd7 14.Ne5 Rc8 15.g4 dxc4 16.Bxc4[/font] then:

[font color="red"]16...Nh7 17.Bb5 Bxh4 18.Nxd7 Re8 19.Ne5 Rf8 20.Nd7[/font] gives White a small advantage in space.
If [font color="darkred"]16...Nd5 17.Bxd5 Bxd5 18.Bxe7 Qxe7[/font] then:

[font color="darkred"]19.g5 hxg5 20.Nxd7 Bc4 21.Qe3 Qxd7 22.Rxg5[/font] gives White a clear advantage in space; Black has stonger pawns.
[font color="magenta"]19.Nxd7 Bc4 20.Qf3 Qxd7 21.g5 hxg5 22.Rxg5[/font] gives White a great deal more space; Black has better pawns.

If [font color="darkred"]13...Re8 14.Ne5[/font] then:

[font color="darkred"]14...Nbd7 15.g3 dxc4 16.Bxc4 Nd5 17.Bb5 Nxe5 18.dxe5[/font] gives White an annoying pin in the d-file, an attack on the King's Rook and more space.
[font color="magenta"]14...Nc6 15.g4 g5 16.Nxc6 Bxc6 17.Bg3 a6 18.f4[/font] gives White a small advantage in space.

13...Ne4?!

Black invites White to deal structural damage to her center.
If [font color="red"]13...dxc4! 14.Bxc4 g5 15.Bg3 Nd5 16.Bxd5 Bxd5 17.Kb1[/font] is equal.

14.Bxe7!

White has an impressive advantage in space.
If [font color="red"]14.Nxe4![/font] then:

[font color="red"]14...dxe4 15.Bxe4 Bxe4 16.Qxe4 Nd7 17.Bxe7 Qxe7 18.Kb1[/font] gives White an impressive advantage in space.
If [font color="darkred"]14...Bxh4?! 15.g5! Bxg5+ 16.Nfxg5[/font] then:

[font color="darkred"]16...dxe4 17.Bxe4 Qc7 18.Bxb7 Qxb7 19.Ne4 f5 20.Ng3[/font] gives White more activity, the use of the h5 square and the advantage in space
[font color="magenta"]16...Qe7? 17.Nh7! dxe4 18.Bxe4 Bxe4 19.Qxe4 Nd7 20.Nxf8[/font] wins the exchange and Black will have no compensation.

14...Nxc3?

Black exchanges her most important piece.
If [font color="red"]14...Qxe7[/font] then:

If [font color="red"]15.Nxe4 dxe4 16.Bxe4 Bxe4 17.Qxe4[/font] then:

[font color="red"]17...Nd7 18.g5 h5 19.Kb1 g6 20.Rge1 Rad8 21.Rc1[/font] gives White an extra pawn and more space.
[font color="magenta"]17...Qd7 18.Kb1 Qc6 19.Qe2 Nd7 20.g5 h5 21.g6[/font] gives White an extra pawn and a small advantage in space.

[font color="darkred"]15.Bxe4!? dxe4 16.Nxe4 Qc7 17.Kb1 Qf4 18.Ned2[/font] gives White an extra pawn.

[center]BLACK: Darina Saduakassova[/center]

[center][/center]

[center]WHITE: Tan Zhongyi[/center][center]Position after 14...Ne4c3:N[/center]

15.bxc3

This is White's only move.

15...Qxe7 16.g5!

White opens the kingside for her pieces. The rest is short and sweet.

16...h5

If [font color="red"]16...hxg5 17.Nxg5 g6 18.Nxe6!! Qxe6 19.Rxg6+[/font] then:

If [font color="red"]19...Qxg6 20.Bxg6 fxg6 21.Rg1 Kg7 22.h4 Nc6 23.h5[/font] strips away the last pawn shielding the Black King.
If [font color="darkred"]19...fxg6[/font] then White wins after [font color="red"]20.Qxe6+ Rf7 21.Bxg6 Kg7 22.Qxf7+ Kh6 23.Rg1[/font] when Black cannot prevent 24.Qh7#.

17.g6 fxg6 18.Ne5 dxc4

If [font color="red"]18...Nd7 19.Nxg6 Qa3+ 20.Kb1[/font] then:

If [font color="red"]20...Qxc3 21.Rc1 Qa3 22.Qxe6+[/font] then:

[font color="red"]22...Rf7 23.Nf4 Qb4+ 24.Ka1 Qf8 25.Nxh5 Kh8 26.Rg3[/font] leaves further resistance pointless.
If [font color="darkred"]22...Kh7 23.Nxf8+ Kh8 24.Ng6+ Kh7 25.Bf5[/font] then:

If [font color="darkred"]25...Qb4+[/font] then [font color="darkred"]26.Ka1 Qd6 27.Ne7+ Kh8 28.Rxg7 Qxe6 29.Rh7#.[/font]
If [font color="magenta"]25...Nf6 26.Ne5+[/font] then:

If [font color="magenta"]26...Kh8[/font] then [font color="magenta"]27.Nf7+ Kg8 28.Nh6+ Kh8 29.Qg8+ Rxg8 30.Nf7#.[/font]
If [font color="darkorange"]26...g6[/font] then [font color="darkorange"]27.Qf7+ Kh8 28.Nxg6#.[/font]

If [font color="darkorchid"]20...Rfc8[/font] then [font color="darkorchid"]21.Qxe6+ Kh7 22.Ne5+ Kh8 23.Qh6+ gxh6 24.Nf7#.[/font]

If [font color="blue"]18...Qa3+ 19.Kb1 Qxc3 20.Rc1[/font] then:

If [font color="blue"]20...Qb4+ 21.Ka1 Nc6 22.Nxc6[/font] then:

[font color="blue"]22...Bxc6 23.Qxe6+ Rf7 24.Bxg6 Raf8 25.Qxc6[/font] leaves White a piece to the good.
If [font color="dodgerblue"]22...Qd6[/font] then [font color="dodgerblue"]23.Bxg6 Bxc6 24.Qxh5 Rxf2 25.Qh7+[/font] is crushing.

If [font color="darkblue"]20...Qxd4 21.Rxg6 Rxf2 22.Rcg1 Kf8 23.Rf1 Rf6 24.Rfxf6+.[/font]

19.Bxg6 Qa3+

This could be a harikari move.
More stubborn is [font color="red"]19...Nd7 20.Qxh5 Nf6 21.Qh3[/font] when:

[font color="red"]21...Be4 22.Kb2 Bf5 23.Bxf5 exf5 24.Ng6 Qe2+ 25.Ka1[/font] gives White a clear victory.
[font color="darkred"]21...Qa3+ 22.Kb1 Qe7 23.Rg4 Bg2 24.Rxg2[/font] gives White an extra piece.

20.Kb1 Qxc3

[font color="red"]20...Bf3[/font] is good enough to prevent mate, but after [font color="red"]21.Nxf3 Rf6 22.Be4 Qxc3 23.Bxa8[/font] it's just ugly.

[center]BLACK: Darina Saduakassova[/center]

[center][/center]

[center]WHITE: Tan Zhongyi[/center][center]Position after 20...Qa3c3:p[/center]

21.Bh7+! 1-0

White forces mate: [font color="red"]21...Kxh7 22.Qxh5+ Kg8 23.Rxg7+ Kxg7 24.Rg1+ etc.[/font]
Saduakassova resigns.

Jack Rabbit

(45,984 posts)

10. Girya (Russia) - Benmesbah (France), Round 5

Reply to Jack Rabbit (Reply #5)

Fri Apr 19, 2013, 02:59 PM

Apr 2013

Russia's Olga Girya won a gold medal for her outsanding performance by the reserve palyers.

[center]

[/center]

[center]Olga Girya[/center][font size="1"]Posted to YouTube by EugenePotemkin
[/font]

Olga Girya (Russia) - Natacha Benmesbah (France)
Women's World Team Championship, Round 5/Board4
Astana, 7 March 2013

West India Game: Tal-Indian Defense (Main Line)

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2 Bg7 8.e4 0-0 9.Be2 Re8 10.0-0 Nbd7 11.a4 a6 12.Qc2 Ne5

For a survey of this opening up to here, see [link:|Meier-Gashimov, Euro ChT, Novi Sad, 2009.

13.a5

If [font color="red"]13.Ra3 g5[/font] then:

If [font color="red"]14.a5 Rb8[/font] then:

If [font color="red"]15.Re1[/font] then:

[font color="red"]15...g4 16.Nf1 b5 17.axb6 Qxb6 18.Ng3 h5 19.Bg5[/font] is equal (García Palermo-Henley, Op, Lone Pine, California, 1977).
If [font color="darkred"]15...h6?![/font] then:

[font color="darkred"]16.Nd1 Ng6 17.Ne3 Qe7 18.f3 g4[/font] gives White the advantage in space (Klimov-Rychagov, Russian Ch HL, Novokuznetsk, 2008).
[font color="magenta"]16.Nf1 Ng6 17.Ng3 Nf4 18.Bd2 Ng4 19.Bxg4 Bxg4 20.Nd1[/font] gives White a small advantage in space (Khismatullin-Yuffa, Russian Ch HL, Tyumen, 2012).

If [font color="darkred"]15.Nd1 Ng6 16.Ne3 Nf4 17.Bd1[/font] then:

If [font color="darkred"]17...h5[/font] then:

[font color="darkred"]18.f3 h4 19.Ndc4 N6h5 20.Rb3 b5 21.axb6[/font] gives White an extra pawn, that being an advanced passer (Johannessen-K. Lie, Norwegian Ch, Moss, 2006).
If [font color="magenta"]18.Nec4 h4 19.Rb3 Qe7 20.Rb6[/font] then:

[font color="magenta"]20...Nxe4?! 21.Nxe4 Qxe4 22.Qxe4 Rxe4 23.Nxd6[/font] gives White a clear advantage in space (Portisch-Suba, ITZ, Tunis, 1985)
[font color="darkorange"]20...Rd8 21.Kh1 Nd7 22.Rb3 Ne5 23.Nxe5 Bxe5 24.Nc4[/font] gives White a small advantage in space.

[font color="darkorchid"]17...Qe7 18.f3 N6h5 19.Ndc4 Bd4 20.Kh1 Bd7 21.g3[/font] gives White a small advantage in space.

If [font color="darkred"]14.Nd1[/font] then:

[font color="darkred"]14...Ng6 15.Ne3 Nf4 16.Bd1 b6 17.f3 Rb8 18.g3 Ng6[/font] is equal (Spraggett-Barlov, Op, New York, 1987).
[font color="magenta"]14...b6 15.Ne3 Rb8 16.Re1 Ng6 17.f3 b5 18.axb5 axb5[/font] is equal (Andruet-Renet, IT, Marseille, 1988).

13...Bg4 14.f4 (N)

[font color="red"]14.f3 Bd7 15.f4 Neg4 16.Nf3 b5 17.axb6 Qxb6[/font] is equal (A, Mirzoev-Esposito, Op, Milan, 2012).

14...Bxe2

The game is equal.

[center]BLACK: Natacha Benmesbah[/center]

[center][/center]

[center]WHITE: Olga Girya[/center][center]Position after 14...Bg4e2:B[/center]

15.fxe5!?

The sacrifice may be speculative, but we may presume that Olga Alexandrovna prepared it.
[font color="red"]15.Nxe2 Ned7 16.Ng3 Rf8 17.Nf3 Rc8 18.Bd2 Re8[/font] gives White a slight edge.

15...Bxf1

[font color="red"]15...Nxd5 16.Nxd5 Bxf1 17.Nxf1 Bxe5 18.Bd2 Rb8 19.Bc3[/font] remains equal.

16.exf6 Bxg2!?

[font color="red"]16...Qxf6 17.Nxf1 Rac8 18.Be3 Qe7 19.Nd2 f5 20.Re1[/font] gives Black a slight edge.

17.fxg7!

White has a small advantage in space.

17...Bh3

This is obviously forced.
Black won't take the pawn at g7 until she's forced to or just doesn't have anything better to do.

18.Nf3

If [font color="red"]18.Qd3[/font] then:

If [font color="red"]18...Bd7 19.Qg3 Bb5 20.e5[/font] then:

If [font color="red"]20...Rxe5 21.Nde4 f6 22.Bf4 Rh5 23.Bxd6 f5 24.Bc7[/font] gives White a strong game.
[font color="magenta"]20...Qe7?! 21.Nde4! Qxe5 22.Qxe5 Rxe5 23.Bh6[/font] suddenly threatens mate.

[font color="darkred"]18...Qg5+?! 19.Qg3! Qh5 20.b3 Re7 21.Nc4 f5 22.Nxd6[/font] gives a clear advantage in space.

18...Qd7

[font color="red"]18...Bg4 19.Nd2 f5 20.Nc4 Qf6 21.Qg2 Qd4+ 22.Ne3[/font] is equal.

19.Qf2

[center]BLACK: Natacha Benmesbah[/center]

[center][/center]

[center]WHITE: Olag Girya[/center][center]Position after 19.Qc2f2[/center]

19...Qg4+!

Black plays her most active available move and gives it her best shot. White has more activity and freedom.
If [font color="red"]19...f6 20.Bh6[/font] then:

If [font color="red"]20...Qg4+ 21.Qg3[/font] then:

[font color="red"]21...Kf7 22.Kf2 Red8 23.Ng1 Qxg3+ 24.Kxg3 Bd7 25.Rf1[/font] give White two minor pieces for a Rooka and a pawn; White's pieces are more active.
If [font color="darkred"]21...Qxg3+? 22.hxg3[/font] then:

[font color="darkred"]22...Re7 23.Nd2 Rae8 24.Nc4 Rd7 25.Kf2 Red8 26.Rh1[/font] White wins material ath Black's Bishop will soon be trapped.
[font color="magenta"]22...Rad8 23.e5 dxe5 24.Ne4 Kf7 25.Nfg5+ fxg5 26.Nxg5+[/font] gives White two minor piece and a great deal more freedom for a Rook.

If [font color="darkorchid"]a) 20...Rad8 21.Nd2 Qg4+ 22.Kh1[/font] then:

[font color="darkred"]22...Qh5 23.Bf4 g5 24.Bg3 Qg6 25.Bxd6 Rxd6 26.Qg3 [/font]gives White a material advantage and the initiative.
[font color="magenta"]22...Rd7 23.Be3 Kxg7 24.Rg1 Qh5 25.Ne2 Kg8 26.Nf4[/font] gives White a winning advantage greater activity in spite of a material deficit.

If [font color="darkred"]b) 20...Re7?! 21.Nd2[/font] then:

[font color="darkred"]21...g5 22.Qg3 Rae8 23.Re1 Rd8 24.Nc4 Rf7 25.Nxd6[/font] gives White two Knights for a Rook.
If [font color="magenta"]b1) 21...Qg4+ 22.Kh1[/font] then:

[font color="magenta"]22...f5 23.Rg1 Qh5 24.Bf4 fxe4 25.Ndxe4 Rf7 26.Nxd6[/font] gives White a decisive advantage with her queenside attack.
If [font color="darkorange"]22...Qh5[/font] then White wins after [font color="darkorange"]23.Bf4 Rd7 24.Nc4 Rxg7 25.Bxd6 Rd8 26.Qxf6.[/font]

If [font color="magenta"]b2) 21...Rd8 22.Kh1 Rf7 23.Nc4 g5[/font] then:

[font color="magenta"]24.Rg1! Qe7 25.Qg3 Bc8 26.b3 Rd7 27.h4[/font] gives White two Knights for a Rook.and a pawn; White can open the kingside at will.
If [font color="darkorange"]24.Qg3 Qg4! 25.Qxg4 Bxg4 26.Kg2[/font] then:

[font color="darkorange"]26...Bd7 27.Nxd6 Bh3+ 28.Kxh3 Rxd6 29.Rf1 Re7 30.Kg4[/font] gives White more freedom, more activity and two minor pieces for a Rook.
If [font color="purple"]26...Bc8?[/font] then White wins after [font color="purple"]27.Re1 Re7 28.e5 fxe5 29.Ne4 Bf5 30.Nf6+.[/font]

20.Qg3!

White replies with her best.
[font color="red"]20.Kh1!? Rxe4! 21.Nxe4 Qxe4 22.Bd2 Qxd5[/font] gives Black three pawns for a minor piece and activity for her minor pieces.

20...Qxg3+ 21.hxg3 f6

[font color="red"]21...Rad8 22.Bg5 Rd7 23.e5 Kxg7 24.Bf6+ Kg8 25.Ne4[/font] leaves White with a fierce attack on Black's King; given White's activity, it is hard to believe that Black has a material plus.

22.Ra3

[font color="red"]22.Nd2 Rad8 23.Nc4 g5 24.Ra3 Bc8 25.Rb3[/font] leaves White threatening to breakthrough on the queenside; in addition, she still has two minor pieces for a Rook and a pawn.

22...g5?!

If [font color="red"]22...c4?![/font] then:

If [font color="red"]23.Bf4 Rad8 24.Nd2 g5 25.Be3[/font] then:

[font color="red"]25...Bd7 26.Nxc4 Bb5 27.Nd2 Bd3 28.Bd4 Kxg7 29.Kf2[/font] wins a pawn for White after 30.Ke3 Bb5 31.Nxb5 axb5 32.Rb3.
If [font color="darkred"]25...Kxg7? 26.Nxc4! Rd7 27.Rb3 Red8[/font] then:

[font color="darkred"]28.Rb6 Bg4[/font] then White wins after [font color="darkred"]29.Bd4 Kf7 30.b4 h6 31.b5 Bh5 32.bxa6.[/font]
If [font color="magenta"]28...h5[/font] then:

If [font color="magenta"]29.Bc1[/font] then White wins after [font color="magenta"]29...Bg4 30.b3 Bf3 31.Ba3 Rc8 32.Bxd6 g4 33.Bb4.[/font]
White wins after [font color="darkorange"]29.b3 Rc8 30.Bc1 h4 31.Ba3 Rf7 32.gxh4 gxh4 33.Nd1.[/font]

If [font color="darkred"]23.Be3 Rac8 24.Nd2[/font] then:

[font color="darkred"]24...Red8 25.Bd4 Kxg7 26.Ra4 Rd7 27.Nxc4 Rcd8 28.Bb6[/font] gives White a significant advantage in space.
If [font color="magenta"]24...Bd7 25.Bh6 f5 26.Ra1 Re5 27.Rf1 Re7 28.exf5.[/font]

23.Rb3! Re7?

Black wastes a tempo protecting a pawn that was in no real danger.
If [font color="red"]23...Red8[/font] then:

If [font color="red"]24.e5 dxe5 25.Ne4[/font] then:

[font color="red"]25...Kxg7 26.Rxb7+ Rd7 27.Rb6 Rf8 28.d6 Ra7 29.Nxc5[/font] gives White excellent winning chances with two minor pieces for a Rook and a pawn, an advanced passer and a significant advantage in space.
If [font color="magenta"]25...Rab8?[/font] then White wins after [font color="magenta"]26.Nxf6+ Kxg7 27.Rb6 h6 28.Nh5+ Kh7 29.Nxe5.[/font]

If White takes the b-pawn, [font color="darkred"]24.Rxb7?!,[/font] then [font color="darkred"]24...Rdb8! 25.Rb6 Rxb6 26.axb6 Rb8 27.e5 fxe5[/font] gives White only a small advantage with two minor pieces for a Rook and a pawn, but his pawn are weak.

[center]BLACK: Natacha Benmesbah[/center]

[center][/center]

[center]WHITE: Olga Girya[/center][center]Position after 23...Re8e7[/center]

24.Rb6!

White leaves Black with no useful moves.

24...Bg4

If [font color="red"]24...Rd7 25.e5 fxe5 26.Nxg5[/font] then:

[font color="red"]26...Bf5 27.Nge4 Rxg7 28.Kg2 Rb8 29.Nxd6[/font] guarantees White a pawn.
If [font color="magenta"]28...Rd3[/font] then White wins after [font color="magenta"]29.Rxd6 Rb8 30.Bh6 Rd4 31.Ng5 Rg4 32.Nce4.[/font]

[font color="darkred"]26...Rxg7 27.Nxh3 Rxg3+ 28.Kh2[/font] then:

If [font color="darkred"]28...Rg6[/font] then White wins after [font color="darkred"]29.Ne4 Rb8 30.Bg5 Kf7 31.Nxd6+ Kg7 32.Be7.[/font]

25.Nh2

Also good is [font color="red"]25.Nd2[/font] when:

[font color="red"]25...Rc7 26.Nc4 h6 27.Nxd6 Rb8 28.Be3 Bd7 29.Nf5[/font] gives White two minor pieces for a Rook and a pawn, an advanced passed pawn, more activity for his pieces and an impressive advantage in space.
If [font color="darkred"]25...Rb8 26.Nc4 h6 27.Nxd6 Rc7 28.Be3 Bd7 29.Nf5.[/font]
If [font color="magenta"]25...Rxg7[/font] then White wins after [font color="magenta"]26.Nc4 Rc7 27.Nxd6 Kf8 28.Nxb7 Bc8 29.Nd6.[/font]

25...Bh5 26.Rxd6 Kxg7 27.Be3 Rc8

If [font color="red"]27...Rc7 28.Na4[/font] then:

If [font color="red"]28...c4 29.Nc5[/font] then:

[font color="red"]29...Re8 30.Ne6+ Rxe6 31.Rxe6 c3 32.bxc3 Rxc3 33.Bd4[/font] gives White a piece for two pawns.
[font color="magenta"]29...Rf7 30.Rb6 Be2 31.Nxb7 h6 32.Bd4 h5 33.Nc5[/font] gives White two minor pieces for a Rook and more activity for his pieces.

[font color="darkred"]28...Rac8 29.Rb6 Be8 30.Nc3 Bh5 31.e5 Rb8 32.exf6+[/font] gives White two minor pieces for a Rook.

28.Nf1 Bg6 29.Nd2 h5 30.Rb6 h4

This leads to a further weakening of Black's kingside, but nothing Black does now will make any difference.
If [font color="red"]30...Bh7 31.Nc4[/font] then:

If [font color="red"]31...Rg8[/font] then White wins after [font color="red"]32.e5 fxe5 33.Bxg5 Rf7 34.Nxe5 Rf5 35.Rxb7+.[/font]
If [font color="darkred"]31...Kg8[/font] then White wins after [font color="darkred"]32.Rxf6 Rg7 33.d6 Re8 34.Nb6 Rd8 35.e5.[/font]

[center]BLACK: Natacha Benmesbah[/center]

[center][/center]

[center]WHITE: Olga Girya[/center][center]Position after 30...h5h4[/center]

31.gxh4 gxh4 32.d6

Black is toast.

32...Rd7

[font color="red"]32...Re6[/font] fails agaisnt [font color="red"]33.d7.[/font]

33.Nb3 Rc6

If [font color="red"]33...Rcd8 34.Nxc5 Rxd6 35.Nxb7 Rxb6[/font] then:

[font color="red"]36.axb6 Rg8 37.Na5 Be8 38.b7 Bd7 39.Kh2[/font] is followed by 40.Ba7 and the pawn will queen.
[font color="darkred"]36.Nxd8?[/font] is a blunder: after [font color="darkred"]36...Rxb2! 37.Ne6+ Kf7 38.Nf4 Bh7 39.Bf2 Rc2[/font] the game is level.

34.Rxc6 bxc6 35.Bf4 Kf7

If [font color="red"]35...Ra7[/font] then White wins after [font color="red"]36.Nxc5 Be8 37.N3a4 Kg8 38.Nb6[/font]

36.Nxc5 Rd8 37.Nxa6 Ra8

If [font color="red"]37...Rg8[/font] then White wins after [font color="red"]38.Kh2 Rd8 39.Nc7 Rb8 40.a6 Rxb2+ 41.Kg1 Rb8 42.a7.[/font]

38.d7 Ke7 39.Nc5 Kd8

If [font color="red"]39...Rd8[/font] then after [font color="red"]40.a6 Rg8 41.Kh2 Bh5 42.Bc7[/font] Black is kaput.

40.N3a4 Ra7 41.Nb6 1-0

Mlle. Benmesbah resigns.

Jack Rabbit

(45,984 posts)

12. 29th International Open, Cappelle-la-Grande, France

Reply to Jack Rabbit (Reply #1)

Fri Apr 19, 2013, 11:05 PM

Apr 2013

[center][/center]

[center]Dunkerque[/center][font size="1"]Photo by B. Navez (http://commons.wikimedia.org/wiki/User:B.navez)] in Wikipedia
(Creative Commons License, Attribution/Share Alike)
[/font]

Jack Rabbit

(45,984 posts)

13. Papin - Sjugirov, Round 6

Reply to Jack Rabbit (Reply #12)

Fri Apr 19, 2013, 11:06 PM

Apr 2013

Last edited Sat Apr 20, 2013, 02:14 AM - Edit history (1)

Eight competitors finished tied for first in the 29th International Open at Cappelle-la-Grande, France, near Dunkerque. By virtues of tie breaks, Russian GM Sanan Sjugirov was the first among equals.

[center][/center]

[center]Sanan Sjugirov[/center][font size="1"]Photo by Andreas Kontokanis in [link:flickr|http://www.flickr.com] (http://www.flickr.com/photos/8022405@N02/4770792216)
(Creative Commons License, Attribution/Share Alike)
[/font]

Vasily Papin - Sanan Sjugirov
29th International Open, Round 6
Cappelle-la-Grande, 27 February 2013

English Game: Agincourt Defense

1.Nf3 d5 2.c4 c6 3.e3 Nf6 4.Nc3 e6 5.b3 Bd6 6.Bb2 0-0 7.Be2 Nbd7 8.Qc2 Qe7 9.0-0 b6 10.cxd5 exd5

If [font color="red"]10...cxd5 11.Nb5 Ba6 12.Rfc1[/font] then:

[font color="red"]12...Rfc8 13.Qd1 Bxb5 14.Bxb5 Ba3 15.Rab1 Bxb2 16.Rxb2[/font] is equal (Roiz-Le Roux, Op, Gibraltar, 2011).
[font color="darkred"]12...Rac8 13.Qd1 Bxb5 14.Bxb5 Ba3 15.Bxa3 Qxa3 16.d4[/font] is equal (Anastasian-Asrian, Armenian Ch, Yerevan, 2006).

11.Nd4 Nb8 (N)

[font color="red"]11...Bb7 12.Nf5 Qe6 13.Nxd6 Qxd6 14.d4 Rfe8 15.Rfd1[/font] is equal (Grischuk-Karjakin, Tal Mem Blitz, Moscow, 2010).

12.Nf5

The game is equal.

12...Bxf5 13.Qxf5 Nbd7

[font color="red"]13...a5 14.Rac1 Re8 15.h3 Ra7 16.Qc2 Qe5 17.f4[/font] remains equal.

14.Rac1 g6 15.Qh3 b5!?

Black voluntarily creates a pawn weakness on the queenside.
[font color="red"]15...Ba3 16.Bxa3 Qxa3 17.Rc2 Qd6 18.d4 Rae8 19.Rfc1[/font] remains equal.

[center]BLACK: Sanan Sjugirov[/center]

[center][/center]

[center]WHITE: Vasily Papin[/center][center]Position after 15...b6b5[/center]

16.Nb1!

Black unmasks the attack on Black's c-pawn.

16...Rac8?!

Black drops a pawn.
If [font color="red"]16...Nb8[/font] then [font color="red"]17.f4 Ne8 18.f5 Be5 19.Bxe5 Qxe5 20.Rf3[/font] gives White a small advantage in space.

17.Bxf6!

White sees how to pick it up.

17...Nxf6 18.Bxb5

White has an extra pawn.

18...c5

Of course, Black cannot take the Bishop.
If [font color="red"]18...cxb5??[/font] then White wins after [font color="red"]19.Rxc8! Rxc8 20.Qxc8+.[/font]

19.Nc3 c4 20.bxc4 dxc4 21.Na4!?

White moves the Knight and abandons control of e4.
If [font color="red"]21.a4 Rc5 22.f4 Rd8 23.Qf3[/font] then:

If [font color="red"]23...Bc7 24.Qe2 Ba5 25.Bxc4 Bxc3[/font] then:

If [font color="red"]26.Rxc3![/font] then:

[font color="red"]26...Ne4 27.Rd3 Rxc4 28.Rxd8+ Qxd8 29.Qxc4 Nxd2 30.Qd4[/font] forces the exchange of Queens, leaving White with the exchange plus an extra pawn.
[font color="darkorange"]26...Nd5 27.Rb3 Qc7 28.Bb5 Ne7 29.Rd3 Rc2 30.e4[/font] gives White two extra pawns and the means to defend the weakest one.

[font color="magenta"]26.dxc3?! Ne4 27.Rc2 Qc7 28.Bb3 Rb8 29.Rb2 Rxc3[/font] is equal.

[font color="darkred"]23...Rc7 24.Qe2 Bb4 25.Bxc4 Bxc3 26.Rxc3 Ne4 27.Rc2[/font] gives White two extra pawns.

[center]BLACK: Sanan Sjugirov[/center]

[center][/center]

[center]WHITE: Vasily Papin[/center][center]Position after 21.Nc3a4[/center]

21...Ne4!

The Black Knight moves into the abandoned square and threatens to win the pawn at d2.

22.Rfd1 Qf6!

Black has equalized.
If [font color="red"]22...h5 23.Nc3 Ba3[/font] then:

[font color="red"]24.Qd7 Qxd7 25.Bxd7 Bxc1 26.Nxe4 Ba3 27.Bxc8 Rxc8 28.Kf1[/font] gives White an extra pawn.
[font color="darkred"]24.Rb1?! Rfd8! 25.g3 a5 26.Nxe4 Qxe4 27.Ba6 Rc7[/font] is equal.

23.Qf3

If [font color="red"]23.f4 c3 24.dxc3 Ba3 25.Rc2[/font] then:

If [font color="red"]25...Nxc3[/font] then:

If [font color="red"]26.Re1 Rfd8 27.Bf1[/font] then:

[font color="red"]27...Rc7 28.f5 Bd6 29.Nxc3 Rxc3 30.Rxc3 Qxc3 31.Qh4[/font] is equal.
[font color="darkorange"]27...Rc6 28.Nb2 Bxb2 29.Rxb2 Ne4 30.Rb7 a5 31.Rd7[/font] is equal.

[font color="magenta"]26.Rf1 Rc7 27.Nxc3 Rxc3 28.Rxc3 Qxc3 29.Kh1[/font] is equal.

[font color="darkred"]25...Rxc3!? 26.Nxc3! Nxc3 27.Qd7 Nxd1 28.Qxd1 Qe7 29.Qe2[/font] leaves White slightly better.

23...Qe5

If [font color="red"]23...Bxh2+ 24.Kf1[/font] then:

[font color="red"]24...Qe6 25.Nc3 Nxc3 26.dxc3 Bd6 27.Qd5 Qxd5 28.Rxd5[/font] gives White a clear advantage in space.
[font color="darkred"]24...Qh4 25.g3 Bxg3 26.fxg3 Nxg3+ 27.Kg2 Nh5 28.Bd7[/font] gives White a small advantage with a material advantage agaisnt Black's much safer King.

24.Rxc4! Ng5

[font color="red"]24...Rxc4?! 25.Bxc4! Qxh2+ 26.Kf1 Qh1+ 27.Ke2 Qh4 28.Bb3[/font] leaves White standing slightly better.

25.Qg4 h5 26.Qxc8?!

Although White gets two Rooks for the Queen, he trades an active piece, greatly improving Black's prospects.
Better is [font color="red"]26.Qd7 Qxh2+ 27.Kf1[/font] when:

If [font color="red"]27...Rxc4 28.Bxc4 Qh1+ 29.Ke2 Qxg2 30.Qxd6 Qg4+ 31.Kd3 Ne4[/font] gives Black a small advantage after he takes back the piece (for example, 32.f3 Nf2+ 33.Ke2 Qxc4).
[font color="darkred"]27...Qh1+!? 28.Ke2! Qxg2 29.Bc6! Qh2 30.Rh1 Qe5 31.f4[/font] is equal.

[center]BLACK: Sanan Sjugirov[/center]

[center][/center]

[center]WHITE: Vasily Papin[/center][center]Position after 26.Qg4c8:R[/center]

26...Rxc8 27.Rxc8+ Kg7

Despite the fact that all of the moves following White's inaccuracy were forced, it is now Black who stands slightly better.

28.Bc6

If [font color="red"]28.Rcc1?! Qxb5 29.Nc3 Qf5[/font] then:

[font color="red"]30.Rf1 h4 31.f4 Ne4 32.Nxe4 Qxe4 33.Rf2 Bb4[/font] gives Black a strong game with the deadly threat of 34...Bxd2 35.Rxd2 Qxe3+!
If [font color="darkred"]30.h3? Nxh3+ 31.gxh3 Qxh3 32.f4 Qg3+[/font] then:

[font color="darkred"]33.Kf1 Qh2 34.Rb1 Be7 35.Rdc1 Bh4 36.Nd1 Qxd2[/font] weaves a mating attack around White's King.
If [font color="magenta"]33.Kh1 g5[/font] then:

If [font color="magenta"]34.Re1 Qh3+ 35.Kg1 gxf4 36.Kf2 fxe3+[/font] then:

[font color="magenta"]37.Rxe3 Qh2+ 38.Kf3 Bc5 39.Ne2 Qh3+ 40.Kf2 Qf5+[/font] wins material.
If [font color="purple"]37.dxe3[/font] then Black wins after [font color="purple"]37...Bg3+ 38.Ke2 Bxe1 39.Rxe1 Qg2+ 40.Kd1 h4.[/font]

If [font color="darkorange"]34.Rf1[/font] then Black wins after [font color="darkorange"]34...Qh3+ 35.Kg1 gxf4 36.Kf2 Qh2+ 37.Ke1 fxe3.[/font]

28...Qxh2+?!

Black goes for an insignificant pawn.
If [font color="red"]28...Nh3+!! 29.Kf1 Qf5![/font] then:

[font color="red"]30.gxh3 Qxc8 31.Rc1 Qxh3+ 32.Bg2 Qxh2 33.d4[/font] Black has a slight material edge, more activity for his pieces and a passed h-pawn; White's passed pawn is retrained.
[font color="darkred"]30.Rg8+ Kxg8 31.gxh3 Bb4 32.Nc3 Qxh3+ 33.Ke2 Qxh2[/font] gives White a stong game with a slight material edge and more active pieces.

29.Kf1

Black still has a small advantage in that he can make things very uncomfortable for the White King, but it's nothing White should find particularly dangerous.

29...Qh1+!?

Black would do better to just back out of this incursion now.
[font color="red"]29...Nh3 30.Ke2 Nxf2 31.Rf1 Qh4 32.Bf3 Qxa4[/font] continues to gives Black a small advantage.

30.Ke2

The game is equal.

30...Qh4 31.Bd7?

White is apparently concerned about 31...Qc4, pinning the Bishop to the Rook. However, the text move makes e4 available for Black's Knight.
If [font color="red"]31.Ke1[/font] then:

[font color="red"]31...Ne4 32.Bxe4 Qxe4 33.Rd8 Qe7 34.Rc8 Qe4[/font] remains equal.
[font color="darkred"]31...Qc4[/font] is nothing to be concerned about anyway:

If now [font color="darked"]32.Rb1 Be5 33.Rb7 Qc1+ 34.Ke2 Qc4+ 35.Ke1[/font] remains equal.
If [font color="magenta"]32.Bd7 Qe4 33.Kf1 Qd3+[/font] then:

[font color="magenta"]34.Kg1 Ne4 35.Nc3 Bh2+ 36.Kxh2 Qxd7 37.Nxe4 Qxc8[/font] leaves Black slightly better at best.
[font color="darkorange"]34.Ke1?![/font] gives Black a promising position after [font color="darkorange"]34...Bb4! 35.Rb8 Qd6 36.Rb5 Ne4 37.Rxb4 Qxb4.[/font]

[center]BLACK: Sanan Sjugirov[/center]

[center][/center]

[center]WHITE: Vasily Papin[/center][center]Position after 31.Bc6d7[/center]

31...Ne4! 32.Rc4

Black will win as long as he makes no mistakes.
If [font color="red"]32.f3[/font] then:

If [font color="red"]32...Nf6 33.Bb5 Qg5[/font] then:

If [font color="red"]34.Nc3 34...Qxg2+ 35.Kd3 Nd5[/font] then:

If [font color="red"]36.Re8 Qxf3[/font] then:

[font color="red"]37.Rg1 Qf5+ 38.e4 Qh3+ 39.Kd4 Nxc3 40.dxc3 Qh2[/font] wins another pawn; White has connected passed pawns on the kingside.
If [font color="darkred"]37.Rb1 a6 38.Ne4 Nb4+[/font] then:

[font color="darkred"]39.Kc3 axb5 40.Nxd6 Qc6+ 41.Kxb4 Qxd6+ 42.Kb3 Qd3+[/font] wins at least another pawn; White has connected passers on the King's wing.
[font color="magenta"]39.Rxb4[/font] then Black wins after [font color="magenta"]39...Bxb4 40.Bd7 h4 41.Kc2 h3.[/font]

[font color="burgundy"]36.Kd4 Qxf3 37.Rf1 Qg2 38.Ne4 Qh2 39.Nxd6 Qxd6[/font] gives Black the center and an eactive Queen; the threat is 40...Nb6+!

If [font color="#C08000"]34.Bc6[/font] then Black wins after [font color="#C08000"]34...Qxg2+ 35.Kd3 Ng4 36.Rb1 Ne5+ 37.Kc2 Qe2.[/font]

If [font color="darkred"]32...Qf2+?! 33.Kd3![/font] then:

If [font color="darkred"]33...Nf6 34.Bh3 g5 35.Rc4 Qg3 36.Nc3 g4[/font] then:

[font color="darkred"]37.Ne2 Qf2 38.fxg4 Nd7 39.Nd4 Ne5+ 40.Kc3 hxg4[/font] gives Black more than enough compensaton in piece activity for having only a Queen for two Rooks and a pawn.
If [font color="darkorange"]37.fxg4?[/font] then Black wins after [font color="darkorange"]37...hxg4! 38.Ne2 Qh4 39.Kc2 Qh7+ 40.e4 gxh3.[/font]

[font color="magenta"]33...Ng3!? 34.Bh3! Qe2+ 35.Kc2 g5[/font] is once again equal.

32...Qxf2+ 33.Kd3 Ng3

Black has an easier win after [font color="red"]33...Nf6! 34.Bc6 Ng4 35.Nb2 Ba3[/font] when:

If [font color="red"]36.Rxg4 hxg4 37.Nc4 Qf5+[/font] then:

If [font color="red"]38.e4 Qf2 39.e5 Bc5[/font] then:

If [font color="red"]40.Rc1 Qd4+ 41.Ke2 Qf2+[/font] then:

[font color="red"]42.Kd3 Bb6 43.Rc3 Qf1+ 44.Kc2 Qf5+ 45.Rd3 Bc7[/font] wins material.
If [font color="purple"]42.Kd1[/font] then Black wins after [font color="purple"]42...Qf1+ 43.Kc2 Qxc4+.[/font]

If [font color="darkorange"]40.Kc2[/font] then Black wins after [font color="darkorange"]40...Bb6 41.a4 Qc5 42.Bb5 Qd5 43.Re1 Bf2 44.Re2 Qxg2.[/font]

If [font color="darkred"]38.Be4 Qb5 39.Ba8 f5 40.Rf1 Bc5[/font] then:

If [font color="darkred"]41.Kc3[/font] then Black wins after [font color="darkred"]41...Bb4+ 42.Kd3 Bxd2 43.Kxd2 Qxc4.[/font]
If [font color="magenta"]41.g3[/font] then Black wins after [font color="magenta"]41...Qb8 42.Bd5 Qxg3.[/font]

If [font color="darkorchid"]36.Rf4 Ne5+ 37.Kc2 Qe2 38.Bf3 Nxf3 39.Rxf3 Bxb2[/font] leaves Black with a permanent material advantage.

34.Rd4

This is either a gross error or a harikari move.
[font color="red"]34.Nc3[/font] is the basis of a more stubborn defense, but after [font color="red"]34...Qxg2[/font] Black has connect passed pawns that can be used to slowly, slowly grind out a victory; if now:
[font color="red"]35.Bc6[/font] then Black wins after [font color="red"]35...Qf2 36.Rb1 Be5 37.Bd5 Qf5+.[/font]
[font color="darkred"]35.Rb1 Be5 36.Bc6 Qf2[/font] then:
If [font color="darkred"]37.Bd7[/font] then Black wins after [font color="darkred"]37...h4 38.Ra4 Bxc3 39.Kxc3 Qg2.[/font]
[font color="magenta"]37.Bd5[/font] then Black wins after [font color="magenta"]37...Qf5+ 38.e4 Qf3+ 39.Kc2 h4.[/font]
If [font color="darkred"]35.Rc1 Be5 36.a4 Bxc3 37.R1xc3 Qd5+ 38.Rd4 Qh1.[/font]

[center]BLACK: Sanan Sjugirov[/center]

[center][/center]

[center]WHITE: Vasily Papin[/center][center]Position after 34.Rc4d4[/center]

34...Be5!

Black takes the opportunity to win quickly.

35.Rd5 Qe2+ 0-1

If [font color="red"]36.Kc2 Qc4+[/font] then:

If [font color="red"]37.Kb1[/font] then Black wins easily after [font color="red"]37...Qxd5.[/font]
If [font color="darkred"]37.Nc3 Bxc3 38.dxc3 Qxa2+[/font] then:

If [font color="darkred"]39.Kd3[/font] then after [font color="darkred"]39...Qxd5+ 40.Kc2 Qa2+ 41.Kd3 Qe2+[/font] wins the house.
If [font color="magenta"]39.Kc1[/font] then [font color="magenta"]39...Ne2#.[/font]

Papin resigns.

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