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Ivan Sokolov vs Judit Polgar
Essent Tournament (2006), Hoogeveen NED, rd 4, Oct-26
Nimzo-Indian Defense: Normal Variation. Botvinnik System (E49)  ·  0-1



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Kibitzer's Corner
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Oct-26-06  alekorphy: Humm, in the light of Kasparov's comment on 17...c4 I now understand its superiority over ...Bb7. That might actually invalidate some of the rest of the analysis. I cannot avoid but admire Judit furthermore!
Oct-26-06  Petrocephalon: alekorphy: I don't have an engine either and I'm not an advanced player, but what about 14..e5 15.d5 e4 16.c4 Ne5?
Oct-26-06  Eyal: <Petrocephalon> 14..e5 15.d5 e4 16.c4 Ne5 17.d6 and black seems to be lost (e.g. 17...Rxd6 18.Bxe5 Rxd1 19.Bxc7) <alekorphy> Since the comment about 17...c4 is not in the quotation marks, I'm not sure if it's Kasparov's or Mig Greengard's.
Oct-26-06  Bufon: This is probably the worsest play in a Nimzo-Indian by white i have seen in years, terrible played by Sokolov.

Judith merely took advantage of the disastrous and passive play of Sokolov.

Oct-26-06  euripides: We have seen shorter defeats in this opening fairly recently: I Sokolov vs Aronian, 2006
Oct-26-06  atragon: Sokolov seems to have many problems against Judit (1-5 is the score). This game was played very very bad from Ivan, Judit only made a good game, nothing special against such a poor play from Sokolov.
Oct-26-06  euripides: <alek White has considerable advantage (passed, supported d pawn, centre and kingside space, pair of Bishops, outpost in f5)>

The Nimzo can be treacherous. Spassky had most of those advantages here and it didn't help him much:

Spassky vs Fischer, 1972

Oct-26-06  Petrocephalon: Thanks Eyal.

Oct-26-06  Ezzy: I Sokalov v J Polgar
(4), 26.10.2006
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0–0 5.Bd3 d5 6.a3< Sokalov plays 6 a3 for the first time in his career. Not a good debut I'm afraid> 6...Bxc3+ 7.bxc3 dxc4 8.Bxc4 c5 9.Ne2 <Polgar hasn't yet faced this move over the board.> 9...Qc7 10.Ba2 b6 11.0–0 Ba6 12.Re1 Nc6 13.Ng3 Rad8 14.Bb2 e5 15.Qc2 <New move I think. Illescas v Vellejo-Pons 2004 went 15 Rc1 >15...Rd7 16.Rad1 Rfd8 17.h3 c4 18.a4 <I have a feeling that Sokolov's head was drifting to the queenside when it should be focussed on the volatile centre.> 18...Re8 19.Ba3 e4 20.Bb1 Rd5 21.Ne2 Rg5 22.Nf4 Bc8 23.Qe2 Qd7< I bet this was a bit of a shock for Sokolov. Polgar sacrifices a pawn for active piece play.> 24.Qxc4 Na5 25.Qb4 Nd5 26.Nxd5 Qxd5< Black threatens 27...Bh3 >27.h4 Rg4 28.Qb5 <Sokolov offers the exchange of queens which will be to his advantage (being a pawn up.) But all it does is provokes a retreat from black's queen to d8 where it sets up a combination for an active attack>. 28...Qd8 29.g3 a6 30.Qb4 Qxh4 31.Bxe4 Rxg3+! <Sacrificing material for dangerous piece play on the weak white squares around the white king.> 32.fxg3 Qxe4 33.Rd2 Qf3 34.Kh2 Qh5+ 35.Kg1 Qf3 36.Kh2 Bf5 <Threatening 37...Be4 with a winnig position.> 37.e4 Bxe4 38.Rxe4 Qxe4 39.d5?? <Black now wins material (d5 pawn and a3 bishop.) due to his mating threats against the exposed white king.> 39...Nc4 0–1

Nice attack by Polgar. Wow!! Is she in great form.

Oct-27-06  Chess Classics: WOW! What a tournament so far! After a dissapointing 2005 this is brilliant! YEAH!


Oct-27-06  alekorphy: <euripides The Nimzo can be treacherous. Spassky had most of those advantages here and it didn't help him much:

Spassky vs Fischer, 1972>
Yes indeed, apparently Fischer overcame it quite nicely. I'm not so familiar with the Nimzo (or any opening in particular I have to admit), but I trust your words ;)

Oct-28-06  alekorphy: Here's a reasonable explanation for 17...c4, after watching some Nimzo-Indian games and reading annotations (yes, this move is still stuck here!):

In this particular system (Botvinnik), Black induces a dark-square blockade by White, hemming in his own Bishop. Looking at the position, Judit must've concluded that White was going to seek counterplay on the light squares, and therefore decided to blockade these too. One might think this harms her own light-squared Bishop as well, but the fulcral point here is that this Bishop has the open c8-h3 diagonal to control whenever he wants, while Sokolov's has no way at all to reach an open diagonal, after 19...e4 (a logical follow-up which I guessed on my own - weee!).

In the aforementioned Spassky - Fischer game, Fischer played the Hübner variation with ...e5, tempting White into d5 which closes the centre and makes the light-squared White Bishop look very bad! The difference between these two games is essentially the color of the blockade, and the more advanced Black pawns for Judit. The strategic concerns are, however, very similar.

I hope this explains ...c4 well enough for those of us who aren't so used to strategy :)

Oct-28-06  Bufon: Sokolov should give up the Nimzo-Indian, it just doesnt work for him.
Premium Chessgames Member
  suenteus po 147: <Bufon> Because of one game? If you look at his lifetime record you will see it serves him very well as an opening.
Premium Chessgames Member
  chancho: <Bufon> Sokolov's record vs the Nimzo is OK.

Oct-28-06  Albertan: Here is some analysis that the chess program Shredder 8 and I have done of this game.I have included some text comments which GM Susan Polgar has said about this game at her chess blog.

E49: Nimzo-Indian: Rubinstein: 5 Bd3 d5 6 a3 Bxc3+ 7 bxc3 E49: Nimzo-Indian: Rubinstein: 5 Bd3 d5 6 a3 Bxc3+ 7 bxc3 Opening:Nimzo-Indian Defense:Rubinstein variation:Botvinnik system The Shredder 8 evaluation program gave Polgar a medal for this game for the tactics she used in it.

1.d4 Nf6 2.c4 The Queen's Gambit Opening. 2...e6 Allowing her to rapidly develop her kingside minor pieces. 3.Nc3 Bb4 The Nimzo-Indian Defense, one of Black's most solid ways of playing against the Queen's Gambit.This hypermodern opening was developed by Grandmaster Aron Nimzowitsch who introduced it to master-level chess in the early 20th century. Unlike most Indian openings the Nimzo-Indian does not involve an immediate fianchetto, although Black often follows up with ...b6 and ...Bb7. By pinning White's knight Black prevents the threatened 4.e4 and seeks to inflict doubled pawns on White. White will attempt to create a pawn centre and develop his pieces to prepare for an assault on the Black position. 4.e3 The most popular continuation for White, strengthening his e-pawn and allowing his light-squared bishop to be developed. This move was first played by Akiba Rubinstein and the variation is therefore known as the Rubinstein variation.The Rubinstein System is White's most common method of combating the Nimzo-Indian. White continues his development before committing to a definite plan of action. 4...0-0 The most popular continuation for Black in this position, completing her kingside development way ahead of her opponent. 5.Bd3 Another move which characterizes the Rubinstein, he develops his bishop as actively as possible,aiming it at her kingside.

Oct-28-06  Albertan: 5...d5 The most popular move for Black in this position, gaining a stronger presence in the center and faciliating the development of her light-squared bishop. 6.a3 He forces her to make a decision about the future of her bishop for this game. [Analysis:The main line continues: 6.Nf3 c5 7.0-0 Nc6 8.a3 Bxc3 9.bxc3 dxc4 10.Bxc4 Qc7 11.Bd3 e5 12.Qc2 Re8 13.dxe5 Nxe5 14.Nxe5 Qxe5] 6...Bxc3+ The most popular continuation for Black in this position, giving up the two bishops in order to damage his queenside pawn struture. 7.bxc3 dxc4 This move is the most often played by Black at this stage of the game, ending his influence over the d5-square and deflecting his bishop off the b1-h7 diagonal. 8.Bxc4 c5 A move almost always played by the second player in this position, she creates a pawn lever, which threatens to reduce his pawn center even further. This pawn advance also allows her to develop her queen's knight behind her c-pawn at c6. 9.Ne2 The second most popular move for White in this position, he intends to move the knight first to g3 and then to f4. [Analysis:The main line continues: 9.Nf3 Qc7 10.Ba2 b6 11.0-0 Bb7 12.Ne5 Nc6 (12...Nbd7) ] 9...Qc7 Judit plays the most popular continuation for Black in this position, influencing the e5-square and aiming her queen at his kingside. 10.Ba2 Thinking she will play ....cxd4 at some point, he moves his bishop from being attacked by her queen.And When Polgar develops her queen's knight to c6 this bishop could have come under attack after ....Na5. [Analysis:The main line continues: 10.Bd3 e5 11.0-0 Nc6 12.Bb2 Rd8 (12...e4 13.Bb1) 13.Ng3] 10...b6 The most often played move for Black in this position, intending to fianchetto her bishop at a6. 11.0-0 According to my database a move almost always played by White in this position. 11...Ba6 The most popular continuation for Black, she creates a pin against his knight on e2 which prevents him com being moved to g3 or f4. 12.Re1 The most popular move for Black in this position, centralizing her rook. 12...Nc6 She develops her last minor piece which increases the pressure against his d-pawn. 13.Ng3 Rad8 She creates more central tension (especially against his d-pawn).This move was first played by GM Vallejo Pons in a game he had against GM Illescas Cordoba in the Spanish Team Championship of 2004. [Analysis: 13...Rfd8 14.Bb2 (14.Nh5 Nxh5 15.Qxh5 Na5 16.d5 exd5 17.Bxd5 Bb7 18.c4 b5 19.Bxb7 Qxb7 20.Rb1 Nxc4 21.Qxc5 Rab8 22.a4 a6 23.axb5 axb5 24.h3 Rdc8 25.Qb4 h6 26.e4 Qc7 27.Rb3 Re8 28.Rd3 Qc6 Aleksandrov,A (2615)-Itkis,B (2460)/Kishinev 1998/CBM 64/1/2-1/2 (41) 29.Bf4 Rbd8 30.Rxd8 Rxd8 31.Bg3 Rd2 32.Kh2 Rd4 33.Qe7 Qd7 34.Qc5 Nd2 35.f3 b4 36.Be5 Nb3 37.Qc2 Rd3 38.Qc4 Na5 39.Qxb4 Nc6 40.Qb2 Nxe5 41.Qxe5 Rxf3 1/2-1/2 Aleksandrov,A (2615)-Itkis,B (2460)/Kishinev 1998/CBM 64 (41)) 14...Rac8 a) 14...Na5 15.a4 (15.Bb1 Rac8 16.e4 Nc4 17.Bc1 cxd4 18.cxd4 e5 19.d5 Ne8 20.Bd3 Ned6 21.Qe2 b5 22.Be3 Qd7 23.Rec1 Rc7 24.Nh5 f6 25.h3 Kh8 26.Rc3 Rdc8 27.Rac1 Bb7 28.Qf3 Qe7 29.Qe2 a6 Marin,M (2490)-Dokhoian,Y (2515)/Budapest 1988/EXT 2003/0-1 (65) 30.Bxc4 Rxc4 31.Bd2 Qd7 32.Ng3 a5 33.f3 Ba6 34.Qe1 Qd8 35.Nf1 Qb6+ 36.Qe3 Qd4 37.Rxc4 Nxc4 38.Qxd4 exd4 39.Kf2 Rb8 40.Rc2 b4 41.axb4 axb4 42.Rc1 b3 43.Rb1 Nxd2 44.Nxd2 b2 Marin,M (2490)-Dokhoian,Y (2515)/Budapest 1988/EXT 2003/0-1 (65)) 15...Bc4 16.Bxc4 Nxc4 17.Qe2 Na5 18.e4 Rac8 19.d5 exd5 20.exd5 Qf4 21.c4 Qxc4 22.Qe7 Qxd5 23.Bxf6 Nc6 24.Qe3 gxf6 25.Ne4 Kh8 26.Nxf6 Qf5 27.Ne4 Nd4 28.Rad1 Rc6 29.Ng3 Georgiev,K (2595)-Hjartarson,J (2590)/Linares 1988/CBM 06/1/2-1/2 (41) 29...Qg6 30.Qe5+ f6 31.Qf4 Rcd6 32.Kh1 Qg5 33.Qe4 R6d7 34.h3 Qg6 35.Qf4 Qg5 36.Qe4 c4 37.Rc1 Nb3 38.Rxc4 Nd2 39.Qe8+ Rxe8 40.Rxe8+ Kg7 41.Rg4 1/2-1/2 Georgiev,K (2595)-Hjartarson,J (2590)/Linares 1988/CBM 06 (41);
Oct-28-06  Albertan: : b) 14...Rd7 15.c4 Ne5 16.Qa4 Nd3 17.Qxa6 Nxb2 18.Qb5 Nd3 19.Red1 Nxf2 20.Kxf2 Ng4+ 21.Kg1 Nxe3 22.Rd2 Rxd4 23.Rxd4 cxd4 24.Nf1 Rd8 25.Qb2 Ng4 26.Qe2 h5 27.Qd3 Ne5 28.Qg3 d3 29.Nd2 Cebalo,M (2510)-Pavlovic,M (2569)/Oberwart 2003/CBM 95 ext/0-1 (37) 29...Qc5+ 30.Kf1 Ng4 31.Re1 Qg5 32.Qc7 Qxd2 33.Qxd8+ Kh7 34.Qh4 Qf4+ 35.Kg1 Qd4+ 36.Kf1 d2 37.Bb1+ Kh6 0-1 Cebalo,M (2510)-Pavlovic,M (2569)/Oberwart 2003/CBM 95 ext (37); 15.e4 Qf4 16.h3 cxd4 17.cxd4 Ne5 18.Bb1 Rc7 19.Bc1 Qh4 20.Ra2 Nc4 21.d5 Bc8 22.Qf3 Nd7 23.dxe6 fxe6 24.Qf4 Qxf4 25.Bxf4 e5 26.Bg5 Nf6 27.Rc2 Be6 28.Ba2 Ibragimov,I (2555)-Voitsekhovsky,S (2475)/Kstovo 1997/CBM 59/1-0 (55) 28...b5 29.Nf5 Kf8 30.a4 a6 31.axb5 axb5 32.Rb1 Ra7 33.Bxf6 gxf6 34.Bxc4 Bxc4 35.Ne3 Bd3 36.Rd1 Bxc2 37.Rxd8+ Ke7 38.Rb8 Bxe4 39.Rxb5 Ra8 40.Kh2 Kf7 41.Rb6 f5 42.Nc4 Ra2 43.Nxe5+ Ibragimov,I (2555)-Voitsekhovsky,S (2475)/Kstovo 1997/CBM 59/1-0 (55)] Returning to the moves played in the Sokolov-Polgar game the game continued:

14.Bb2 Developing his last minor piece, a move Illescas Cordoba also played in the above mentioned game. 14...e5 She creates further pressure against his d-pawn, this move was also played by Vallejo Pons in his game against Illescas Cordoba.

[Analysis:Shredder 8: 14...Na5 15.e4 Bc4 16.Bxc4 Nxc4 17.Bc1 cxd4 18.cxd4 Qe7 19.Bg5 h6 20.Qc1!? hxg5 21.Qxc4 Rd7 22.Qd3 Rc8 23.Rec1 Rdc7 24.Ne2 Nh5=]

Oct-28-06  Albertan: 14...e5

She creates further pressure against his d-pawn, this move was also played by Vallejo Pons in his game against Illescas Cordoba. [Analysis:Shredder 8: 14...Na5 15.e4 Bc4 16.Bxc4 Nxc4 17.Bc1 cxd4 18.cxd4 Qe7 19.Bg5 h6 20.Qc1!? hxg5 21.Qxc4 Rd7 22.Qd3 Rc8 23.Rec1 Rdc7 24.Ne2 Nh5=]


This move appears to be a theoretical novelty for the position.He spends a tempo to take the queen off the diagonal her rook is on.This move also connects his rooks and allows him to transfer a rook to d1 without having to worry about a pin against his d-pawn. [Analysis:(a)Shredder 8: 15.d5 Na5 16.Nf5 Nc4 17.Bxc4 Bxc4 18.e4 Ne8 19.Qh5 f6 ; (b)In the game mentioned above Illescas-Cordoba played: 15.Rc1 and the remaining moves of the game are: [Event "ESP-chT"] [Site "Sanxenxo"] [Date "2004.11.18"] [Round "6"] [White "Illescas Cordoba, Miguel"] [Black "Vallejo Pons, Francisco"] [Result "1/2-1/2"] [ECO "E49"] [WhiteElo "2626"] [BlackElo "2678"] [PlyCount "44"] 15. Rc1 Na5 16. Qf3 Rfe8 17. e4 Bc4 18. Bb1 Nb3 19. d5 Nxc1 20. Bxc1 Rd6 21. Nf5 Nd7 22. Nxd6 Qxd6 1/2-1/2 ] Returning to the Sokolov-Polgar it continued with Polgar playing:


She intends to double her rooks on the d-file, which will increase the pressure against his d-pawn. [Analysis:Shredder 8: 15...Na5!?= 16.Qf5 Nc4 17.Bxc4 Bxc4 18.Qg5 Be6 19.f3 exd4 20.cxd4 Nd5 21.e4 Nf4 22.d5 f6 23.Qh4 Ng6 24.Qh5 Nf4 25.Qh4 Ng6=] The game continued with him playing:


He overprotects his d-pawn. [Analysis:Shredder 8: 16.Ne4 Nxe4 17.Qxe4 Ne7 18.Rad1 Rfd8 19.f4 exf4 20.exf4 Qd6 21.Qe5 Qh6 22.f5 Qg5 23.f6 gxf6= (23...Qxe5 24.Rxe5 gxf6 25.Re4 Nf5 26.Bb1 h5=) ] Returning to the game which continued with these moves:

He spends a tempo to secure the g4-square and creates luft for his king. [Analysis:Shredder 8: 17.Ne4 Nxe4 18.Qxe4 Ne7 19.f4 exd4 20.exd4 Bb7 21.Qe5 Qc8 22.Qg5 h6 23.Qg4 cxd4 24.Rxd4 Qc5 25.Re5 Bd5 26.Bxd5 Rxd5 ] The next move in the game was:


She decides to reduce the tension against her c-pawn by advancing the pawn, this makes Sokolov's light-squared bishop extremely passive. [Analysis:Shredder 8: 17...Na5 18.Ne4 Nxe4 19.Qxe4 Nc4 20.Bc1 b5 21.a4 Bb7 (21...bxa4 22.d5 Nb6 23.c4 Qd6 24.Bb2 Qg6 25.Qxg6 fxg6 26.Rc1 Re7=) ]

Oct-28-06  Albertan: 18.a4

He opens up the a3 square for his bishop, intending to move the bishop there to give the piece more mobility. [Analysis:Shredder 8 evaluated that he could have gained an advantage by playing 18.Bb1: 18.Bb1 g6 19.Ne4 Nxe4 20.Qxe4 f5 21.Qh4 e4 22.Bc2 Ne7 23.Qh6 Nd5 ]The next move of the game was:


Sokolov prepares the advance ...e4 [Analysis:Shredder 8: 18...Ne7 19.Ba3 Nfd5 20.Ne4 f6 21.a5!? Ng6 (21...bxa5? 22.Nc5 Bb5 23.Ne6 (23.Nxd7 Rxd7 24.dxe5 Qxe5 ) 23...Qc6 24.Nxd8 Rxd8 ) 22.axb6 axb6 23.Bb1 Bb7 ] The game continued:


He gives his bishop more mobility by placing it on the open diagonal. [Analysis:Shredder 8 gave a better evaluation to the move 19.Ne4: with this continuation possible: 19.Ne4 Nd5 20.Ba3 f6 21.Nd2 Nce7 22.dxe5 fxe5 23.Ne4 Qc6 which would have left Polgar with an isolated pawn.] Polgar's next move of the game was:


She closes down the center and blocks his e-pawn which will make it more difficult for him to advance his d-pawn in the future.


He creates a triple attack against her double-defended e-pawn.This ties down one of his pieces to defend this pawn. [Analysis:Shredder 8: 20.Rb1 Re6 21.Rbd1 Ne7 22.Bc1 Rd8 23.Bb1 Ned5 24.Ba3 b5 25.axb5 Bxb5 26.Bc5 a5 27.Rc1 Rb8=] Polgar now continued the game by playing:


Blockading his passed pawn to prevent it from advancing.21.Ne2 He intends to play his knight to f4 to attack her rook.

[Analysis:Shredder 8: 21.Qe2 Re6 22.f4 Ne7 23.Bc2 Bb7 24.Rf1 Nc8 25.f5 Re8 26.Rf4 Nd6 ] The next move of the game was:


She creates the threat of ...Bc8 which would then allow her to win his h-pawn by ...Bxh3 due to the pin on the White g-pawn. [Analysis:Shredder 8:Gave a better evaluation to the move 21...Ne7 with this continuation possible: 21...Ne7 22.Nf4 Rg5 23.Bxe7 Rxe7 24.Qe2 Qc6 25.Bc2 Re8=] Play in the game continued with Sokolov's move:


He intends to move the knight to d5 to attack her queen.(However for now he prevents the tactical idea of 22....Bc8 23...Bxh3.)


This ties down Sokolov's knight to defend the pawn on h3. [Analysis:Shredder 8: 22...Ne7 23.Bxe7 Rxe7 24.Qb2 Bb7 25.Ba2 Ra5 26.Qb4 b5 27.Ra1 g5 28.Ne2 Nd5 29.Qb2 bxa4 30.Qa3 f5 31.Ng3 Rf7 32.Nh5 Ba6 And White has insuffficient compensation for the pawn.] Returning to the moves of the game which continued:

He attacks her unprotected c-pawn.
23...Qd7!? Rather than defend her pawn she creates more pressure against his h-pawn.

[Analysis:Shredder 8: 23...Ba6!?= is interesting with this continuation possible: 24.h4 Rg4 25.h5 Qd7 26.Ba2 Na5 27.Bb4 Qxa4 28.h6 Rg5 29.hxg7 Kxg7 30.Bd6 Nc6 31.Ra1 Rg8 32.Red1 Bb5© And Shredder evaluates that White has sufficient compensation for the pawn.] Play in the game continued with Sokolov playing:

24.Qxc4 Sokolov grabs the free pawn. 24...Na5 She wins a tempo for the pawn. 25.Qb4 The lost tempo.Shredder 8 evaluates this position as equal. [Analysis:Shredder 8:Better is >=25.Qe2!? with this continuation possible: 25...Qxa4 26.Bb4 Bd7 27.Bc2 Qc6 28.Ra1 Nd5 29.Ba4 Qc7 30.Nxd5 Rxd5 31.Bxd7 Qxd7 32.Bxa5 bxa5 ]

Oct-28-06  Albertan: Polgar's next move in the game was:


The move Shredder was also going to play, threatening to win a tempo unless he now plays Nxd5.

26.Nxd5 Qxd5

[Analysis:Shredder 8:The move 26...Rxg2+! is noteworthy with a possible continuation being: 27.Kxg2 Qxh3+ 28.Kg1 Qg4+ 29.Kh1 Qh5+ 30.Kg1 Qg4+ 31.Kh1 Qh4+ 32.Kg1 Qg5+ 33.Kh2 Qh4+ 34.Kg1 Qg5+ 35.Kh1 Qh6+ 36.Kg1 Qg5 ] Returning to the moves of the Sokolov-Polgar game which continued:


Attacking her rook threatening to win a tempo.

Oct-28-06  Albertan: 27...Rg4

Avoiding the loss of tempo and instead winning a tempo.GM Susan Polgar:"I think White is slightly better but Black has compensation. This is the kind of position where Judit excels in and Sokolov has problems with. It will be interesting to see if he can defend a position like this."


He attacks her unprotected rook on e8 and also offers to exchange queens on b5. [Analysis:Shredder 8: 28.Qd6 Qf5 29.Ba2 Bd7 30.Bb4 Bxa4 31.Ra1 Nc6 32.Bc4 Rd8 33.Qc7 Rc8 34.Qb7 Nd8 35.Qxa7 Rxc4 36.Qxa4 b5 37.Qd1 Rc8© with some compensation for the pawn.] The game continued with Polgar playing:


She declines to exchange queens and has to move her queen so it protected her enprise rook which costs her a tempo. [Analysis:Shredder 8:Better is: >=28...Qxb5 29.axb5 Nc4 30.Bc1 Bd7 31.g3 Bxb5 32.Bc2 a5 ] Sokolov's next move of the game was:


He spends a tempo to protect his h-pawn. [Analysis:Shredder 8:Better is 29.Ba2 with this fascinating continuation possible: 29.Ba2 Bd7 30.Qd5 Re6 31.Bb4 Rf6 32.Qh5 g6 33.Qe5 Rxf2!? 34.Kxf2 Qxh4+ 35.Kg1 Rxg2+!? 36.Kxg2 Qh3+ 37.Kg1 Qg4+ with a draw.] The game continued with Polgar playing:


Attacking his queen winning a tempo.


[Analysis:(a)GM Susan Polgar: "I think 30.Qf1 is alot safer."; 30.Qf1 Qxh4 31.Bd6 Qd8=; (b)Shredder 8: 30.Qe2 Qxh4 31.Qf1 Qf6 32.Bb4 Nc6 33.Ba3 h5 34.Qg2 h4 ] The next moves of the the game were:


Shredder 8 refers to this position as "Mate attack" [Analysis:Shredder 8: 31.Qxb6?? taking the pawn will cause White grave problems 31...Rxg3+ 32.fxg3 Qxg3+ 33.Kh1 Bg4 34.Bxe4 Bxd1 35.Rxd1 Qh4+ 36.Kg1 Qxe4 ] Returning to the moves of the game which continued with Polgar playing:


[Analysis:Shredder 8:(a) 31...Rexe4?? 32.Qf8# Mate attack; (b) 31...Rgxe4?? 32.gxh4 Combination 32...Rg4+ 33.Kf1 Rxh4 ]

Oct-28-06  Albertan: 32.fxg3 Qxe4

Shredder 8 evaluates this position as equal.


[Analysis:(a)Shredder 8: 33.Qxb6? leads to nothing because of: 33...Nc4 34.Qb1 (34.Qb3 Bb7 35.d5 Bxd5 36.Rxd5 Qxd5 37.Bc1 Qe4 38.Rf1 Ne5 ) 34...Qf3 35.Qb8 Nxa3 36.Qf4 Qc6 37.d5 Qg6 ; (b) 33.Qb1 Qf3 34.Qa2 Nc4!? 35.Bc1 (35.Qxc4?? Qxg3+ 36.Kh1 Bf5 37.e4 Bxe4+ 38.Rxe4 Qh3 +) 35...Bd7 36.d5 Qxg3+ 37.Qg2 Qh4 38.Qh2 Qg4+ 39.Qg2 Ne5 40.Qxg4 Bxg4 41.Rd4 Nf3+ 42.Kf2 Nxe1 43.Kxe1 Bd7 44.Rb4 b5 45.axb5 axb5 And White has insufficient compensation for the pawn.]

Oct-28-06  Albertan: 33...Qf3

(Threatening 35...Qxg3+.)


The only move to save the pawn however now his e-pawn is double-attacked. [Analysis:Shredder 8:Worse for White is playing:(a) 34.c4 Nxc4 35.Rf2 (35.Qxc4?? Qxg3+ 36.Rg2 Qxe1+ 37.Kh2 Qxe3 ) 35...Qxg3+ 36.Rg2 Qh4 37.Rh2 Bh3 threatening ...Qg3+ which forces: 38.Rxh3 Qxh3 also worse for white is playing:; (b) 34.Rf1 Qxe3+ 35.Rdf2 Bh3 36.Rd1?? Qxg3+ 37.Kh1 Qxf2 ] Play in the game continued with Polgar playing:


[Analysis:Shredder 8 :Better is: >=34...Bf5 35.Ree2 a) 35.Qxb6?? the pawn of course cannot be captured 35...Nc4 36.Qxa6 Nxd2 (36...Nxa3?! is impossible 37.Qe2 Qc6 38.Rf1 ) ; b) 35.Rg2 Be4 36.Ree2 Qh5+ 37.Kg1 Bxg2 38.Rxg2 ; 35...Be4 36.Rg2 Qh5+ 37.Kg1 the only move 37...Bxg2 38.Rxg2 Qf3 39.Kh2 Qxe3 ] The game continued with the two players making these moves:

35.Kg1 Qf3

Threatening ...Qxg3 winning. Shredder evaluates this position as .


[Analysis:Shredder 8:Worse is: ‹36.Qxb6 Qxg3+ 37.Rg2 Qxe1+ 38.Kh2 Qh4+ 39.Kg1 Rxe3 40.Qb1 Rh3 41.Rxg7+ Kxg7 42.Bf8+ Kh8 43.Bd6 Qg5+ 44.Kf2 Qe3+ 45.Kf1 Rf3+ 46.Kg2 Qf2+ 47.Kh1 Rh3+ 48.Bh2 Rxh2#] Polgar's next move of the game was a good one, she played:


Now the threat is ...Be4 and ...Qh5+ leading to mate.


[Analysis:Shredder 8:Better is: >=37.Ree2!? Be4 threatening ....Qh1 checkmate which forces: 38.Rg2 Qh5+ 39.Kg1 the only move 39...Bxg2 40.Rxg2 Qf3 41.Kh2 Qxe3 ] Returning to the moves of the game which continued:


38.Rxe4 Qxe4

The final mistake by Sokolov. [Analysis:Shredder 8:Better (however not saving the game) was: 39.Rf2 Qc6 40.Qd6 Qxa4 41.Bb4 Qc6 42.Qxc6 Nxc6 ] The game concluded with the move:

39...Nc4 Sokolov resigned.

[Analysis: If Sokolov had continued playing a possible continuation was: 39...Nc4 40.Rf2 Qxd5 41.a5 Nxa3 42.Qxb6 (42.Qxa3?? Re1 threatening ...Qh1 checkmate which forces: 43.Qf8+ Kxf8 44.g4 Qh1+ 45.Kg3 g5 46.Rf5 Re2 47.Rf2 Re3+ 48.Rf3 Rxf3#) 42...Nc4 43.Qd4 Qe6 44.Rf4 Nxa5 ] 0-1

Sep-07-16  Robert Samuels: Game 13 in Reinaldo Vera's book on the Nimzo-Indian. Extremely instructive.
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