|Dec-11-08|| ||THE pawn: With all due respect to all chessgames kibitzers, I understand Svidler missing 34...Rh5 which isn't such a simple tactic in time trouble.|
|Dec-11-08|| ||botevist: Is it still a win after:
Or can white still save it?
|Dec-11-08|| ||slomarko: <THE pawn: With all due respect to all chessgames kibitzers, I understand Svidler missing 34...Rh5 which isn't such a simple tactic in time trouble.>|
huh? it doesn't get any simplier than that.
|Dec-11-08|| ||Eyal: <botevist: Is it still a win after: ... Rh5 f5 Rxf5 Qxf5 Bxf5 Nxf5 Or can white still save it?>|
No, it's completely winning for Black; he can win the knight by 37...Qh1+ 38.Ke2 Qe4+, and even more decisive is 37...Nf4 38.Bc6 (only way to defend against the immediate mate threats) Nxd3.
|Dec-11-08|| ||Albertan: Ivanchuk,V (2786) - Svidler,P (2727) [C99] Pearl Spring Nanjing CHN (1), 11.12.2008 [Analysis by myself and Deep Rybka in analysis mode (30s a move)] Opening in this game: C99: Closed Ruy Lopez: Chigorin Defence: 11 d4 Qc7 12 Nbd2 cxd4
The game began with these moves:
1.e4 e5 2.Nf3 Nc6 3.Bb5 The Ruy Lopez. 3...a6 Morphy's idea,forcing Ivanchuk to make a decision about the future of his bishop in the game. 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 A key fact about this move is that apparently Ivanchuk has no worries about allowing Svidler to play the Marshall Attack against him. 8...d6 No Marshall today. 9.h3 Preventing the pin 9....Bg4. 9...Na5 The main continuation,forcing Ivanchuk to lose a tempo.With 9...Na5 Black chases the white bishop from the a2-g8 diagonal and frees the c-pawn for queenside expansion. 10.Bc2 The lost tempo. 10...c5 Gaining greater influence over d4.This move is almost always played by the second player at this point. 11.d4 The most often played idea, facilitating the development of his queen's bishop and threatening to win a pawn via 12.dxe5 dxe5 13.Nxe5. 11...Qc7 Reinforcing e5 and placing the queen on the c-file which may later become open after ...cxd4. It is this queen move which defines the variation as the Chigorin. 12.Nbd2 By far the most popular continuation for White, he catches up in minor piece development. 12...cxd4 Opening up the c-file 13.cxd4 Now, Ivanchuk's queen is tied down to the defense of his bishop on c2, however...after 13...Nc6 this is no longer the case.Svidler has created a double-attack against Ivanchuk's d-pawn. 14.Nb3!? In many variations of the Ruy Lopez, white transfers this knight to the kingside by playing Nf1-Ng3 or Ne3. In the Chigorin variation, White instead moves the knight to b3 where it overprotects the White d-pawn. [Analysis: According to my database these other moves have also been tried by the first player in this position: 14.a3 ; 14.d5; 14.Nf1; and 14.a4 ] 14...a5 Svidler plays the most popular continuation,threatening to displace Ivanchuk's knight next move via....a4. 15.Be3 A move almost always played in this position, Ivanchuk frees up the c1 square for his knight (in case of 15...a4).His d-pawn now will remain protected twice if Svidler plays ...a4. 15...a4 A move played in 51/52 games in this position in my database, winning a tempo. Now Ivanchuk must decide whether to retreat his knight to d2 or c1. 16.Nbd2 The only move White plays in this position in my database (51 games). 16...Bd7 The most popular continuation for Black, completing the development of his minor pieces. 17.Rc1 The main continuation,threatening to pin Svidler's queen's knight against his queen in the future, once the white-light-squared bishop is moved from c2.
|Dec-11-08|| ||Albertan: 17...Qb7 Svidler prevents any future attack against his queen on the c-file. Now, he applies more pressure to Ivanchuk's e-pawn. [Analysis:These other moves have been tried by the second player in this position: 17...Rac8 ; 17...Rfc8; 17...Qb8] 18.Nf1 Ivanchuk tries to unjam his pieces, intending to move this knight to g3 next move. [Analysis:The main continuation in this position is: 18.Qe2 and play most often continues: 18...Rfe8 19.Bd3 Rab8 20.dxe5 Nxe5 21.Nxe5 dxe5 22.Nf3 Bb4 23.Bd2 (23.Red1) ] 18...h6 Svidler creates luft for his king,the square h7 also becomes available for his king, which would allow him to play ...Rg8, advance his g-pawn and double his rooks on the g-file to attack Ivanchukl's king. This move was only played in 5/94 games in the chessbase online database. [Analysis:The main continuation for Black in this position is: 18...Rfe8 ] 19.Ng3 According to the Chessbase online database, this is the only move White has used in this position. 19...Rfe8 Svidler centralizes his rook.This gives him the opportunity to move his dark-squared bishop to f8, in order to give his e-pawn more support in the future. [19...Rfc8 20.Bb1 Bd8 21.dxe5 dxe5 22.Nh4 Ne7 23.Qf3 Rxc1 24.Rxc1 Ra6 25.Nhf5 Ng6 26.Rd1 Qc8 27.Bd3 Bb6 28.Bd2 Bc5 29.a3 Bf8 30.Be3 Qb8 31.Bf1 Qc8 32.Bd3 Qb8 33.Bf1 Qc8 34.Rd2 Akopian,V (2693)-Kobalia,M (2634)/Moscow 2005/CBM 106/1/2-1/2 (45)] 20.Qd2 Connecting his rooks. 20...exd4N This capture is a theoretical novelty for the position. [Analysis:Other moves played in this position according to Chessbase Megabase and the Chessbase online database are: (a)20...Bf8 and (b)20...Bd8 Examples: 20...Bf8 21.d5 Na5 (21...Ne7 22.Nh4 g5 23.Bxg5 hxg5 24.Qxg5+ Bg7 25.Re3 Nh7 26.Qh5 Nf6 27.Qg5 Nh7 28.Qh5 Nf6 1/2-1/2 Sarenac,D (2258)-Toth,A (2279)/Zlatibor 2007/CBM 119 ext) 22.Bd3 Reb8 23.Rc2 Nc4 24.Bxc4 bxc4 25.Qc1 Qa6 26.Nd2 Bb5 27.Nxc4 Bxc4 28.Rxc4 Rxb2 29.Qxb2 Qxc4 30.Rc1 Qd3 31.Qb7 Rd8 32.Qb4 Ra8 33.Rc7 Ne8 34.Rc3 Qa6 35.Rc6 McShane,L (2592)-Bruzon Bautista,L (2610)/Esbjerg 2003/CBM 096/[Wedberg]/1-0 (39); 20...Bd8 21.Bxh6 Nh7 22.Nh5 g6 23.d5 Na5 24.Ng3 Nc4 25.Qe2 Nxb2 26.Rb1 a3 27.Bc1 Qa7 28.Rf1 Nc4 29.Bd3 Qc5 30.Rb3 Ra4 31.Bh6 Be7 32.Rc1 Rc8 33.Qe1 Qa7 34.Rc2 Bf8 35.Qc1 Beliavsky,A (2570)-Lerner,K (2525)/Moscow 1983/URS-ch/1-0 (65); >=20...Bd8=]
The game continued:
[Analysis:Deep Rybka preferred: 21.Nxd4 with a possible continuation being: 21...d5 (21...a3 22.b3 d5 23.Nxc6 Bxc6 24.e5 Ne4 25.Bxe4 dxe4 26.Nf5 Bf8 ) 22.Nxc6 (22.exd5 Nb4 23.Nc6 Nxc6 24.dxc6 Bxc6 25.Bxh6!? Bf8 (25...gxh6?? 26.Qxh6 Bf8 27.Qg5+) ) 22...Bxc6 23.Bxh6!? dxe4 (23...gxh6? 24.Qxh6 dxe4 25.Nf5 Bf8 26.Qg5+ Kh7 27.Qxf6 ) ] 21...Ne5 Svidler offers to exchange knights on e5. [Analysis:Deep Rybka: 21...gxh6 22.Qxh6 d3 23.Bxd3 Ne5 24.Nxe5 dxe5 ] 22.Bg5 [Analysis:Another idea is to play 22.Bf4: 22.Bf4 with a possible continuation being: 22... 22...Nxf3+ (22...a3 23.b3 Nxf3+ 24.gxf3 Bxh3 25.Qxd4 Nh7 26.Kh2 Be6 ) ] 22...Nxf3+ Svidler plays a mini-combination which will net him a pawn. He also forces Ivanchuk to accept split pawns on the kingside. However, now Ivanchuk will have a half-open g-file to use to attack Svidler's monarch. [Analysis:Deep Rybka:(a)Another plan is to play 22...a3 and play might continue: 23.bxa3 (23.b3 Nxf3+ 24.gxf3 Bxh3 25.Ne2 b4 26.Qxd4 Qb5 (26...Nh5 27.Bd2 Rab8 ) 27.f4) ; (b) 22...Bd8 23.Qxd4 Nxf3+ 24.gxf3 Bxh3 25.Bd3 Ra6 26.Bf1 Be6=] 23.gxf3 Bxh3 For the moment, going up a pawn in material. [Analysis:Deep Rybka:Other ideas in this position include:23...b4, 23...Rec8, 23...a3, and 23...Rac8. Possible continuations involving these moves are: (a) 23...b4 24.Qxd4 b3 25.axb3 axb3 26.Bd3 Bxh3 27.Rc4 Nd7 28.Rb4 Qc7 29.Rc1 Qc5!?; (b) 23...Rec8 24.Nf5 (24.Nh5) 24...Bxf5 25.exf5 Rc4 26.b3 axb3 27.axb3 Rc3 28.Qxd4 Rac8© With compensation for the pawn.; (c) 23...a3 24.bxa3 Bxh3 (24...Rxa3 25.Bb3 Bxh3 26.Qxd4 Be6 27.Nf5 Ra6 (27...Bxb3 28.axb3 Rea8 29.Re3 R3a6 ) ) 25.Qxd4 Rxa3 26.Bb3 Raa8 27.Nf5 Bxf5 28.exf5 Qd7 29.Re6!? Rac8 (29...fxe6?? 30.Bxe6+ ) ; (d) 23...Rac8 24.Ne2 (24.Qxd4 Bxh3 25.Bd3 Rc5 26.Be3 Nd7 27.Qb4 Ne5 28.Be2 Rxc1 29.Rxc1 Bd7=) ]
|Dec-11-08|| ||Albertan: 24.Qxd4 Ivanchuk regains material equality. [Analysis:Deep Rybka:The program provided this move: 24.Ne2 with possible continuations being: 24...Bd8 (24...Nd7 25.Bxe7 Ne5 26.Nxd4 Qxe7 27.f4 Nc4 28.Qd3 Bd7 29.b3 axb3 30.axb3 Na3 31.Bd1 Rac8=) 25.Qxd4 Re5 26.Be3 Ra6 27.Nf4 Bb6 28.Qd3 Bd7 29.Kh1 Bxe3 30.fxe3 Nh5=] 24...Nh7 Forcing Ivanchuk to exchange on e7 or lose a tempo. [Analysis:Deep Rybka: 24...Rac8 25.Bd3 Rc5 26.Be3 Nd7 27.Qb4 Ne5!? 28.Be2 (28.Bxc5?? Nxd3 ) 28...Nc6 29.Qa3 Be6=] 25.Bxe7 [Analysis:Deep Rybka: 25.Nh5 f6 26.Bd2 Be6 27.a3 Rac8 28.Bd3 Rc5 29.Nf4 Ng5 ] 25...Qxe7= Deep Rybka evaluates this position as equal. 26.f4 Ivanchuk prevents Svidler from playing his knight to g5. [Analysis:Another idea is to play26.Bd3 with a possible continuation being: 26.Bd3 Ng5 27.Qe3 a3 28.b3 Bd7 29.Rc7 Nh3+ 30.Kg2 Qh4 31.Ne2 Ng5=] 26...Qh4 Svidler, in playing this move,threatens to win material:27... Qh4xf4 27.Bd3 Ivanchuk is willing to exchange his pawn on f4 for Svidler's b-pawn. [Analysis:Among the other possible continuations in this position are: (a)27.Qd2 (b)27.Rcd1, (c)27.b3 and (d)27.Qxd6: (a) 27.Qd2 Nf6 28.Bd3 Bd7 29.Rc7 Rad8 30.Rb7 Nh5 31.Nxh5 Qxh5 32.f5 Qg4+ 33.Kh2 Qh5+ 34.Kg3 g5 35.Bxb5 Bxb5 36.Rxb5 Qh4 ; (b) 27.Rcd1 Nf8 (b)(i) 28.Qe3 (28.f5 Nd7 29.Bd3 Ne5 30.Be2 Bg4 31.Qe3 Bxe2 32.Qxe2 Ng4 33.Nf1 a3 34.b3 Rac8 ; 28.Qxd6) 28...Ng6 29.Ne2 Bg4 30.Qg3 Bxe2 31.Rxe2 Qxf4 32.Rxd6 Qc1+ 33.Bd1 Rad8 ; (c) 27.b3 Nf6 28.f5 d5 29.bxa4 bxa4 30.Bxa4 Red8 31.Bb3 dxe4 32.Qe5 Re8 33.Qc7 Rf8=; (d) 27.Qxd6 Rad8 28.Qc7 Rc8 29.Qd6 Nf6 30.f5 Red8 31.Qb6 Rd2 ] 27...Re6 Svidler spends a tempo to save his e-pawn.His real intention is to transfer the rook to h6 to threaten Ivanchuk's king. [Analysis:Deep Rybka: 2 other ideas for Black in this position are to play 27...Bd7 or play 27...Rab8. If Svidler had played (a)27...Bd7 then play might have continued: 27...Bd7 28.Rc7 Nf6 29.Rxd7!? Nxd7 (29...a3?? 30.Rxd6 ; 29...d5?? 30.Rb7 Qxf4 31.Rxb5 ) ; (b)If Svidler had played 27...Rab8 then play could have continued: 27...Rab8 28.e5 dxe5 29.Rxe5 Red8 30.Bxh7+ Qxh7 31.Rxb5!? Qh6 32.Rxb8 Rxb8 33.Qxa4 Rxb2 34.Qe8+ Kh7 35.Qe4+ Qg6 ] 28.e5 Ivanchuk threatens to win a pawn via 29.exd5. [Other moves which could have been played by Ivanchuk in this position include: (a)28.Qd5 and (b)28.Bxb5 and (c)Rc7: Analysis:(a) 28.Qd5 Rb8 29.Qh5 Rh6 30.Qxh4 Rxh4=; (b) 28.Bxb5 Rh6 29.Bc6 Bg4 30.e5 Rd8 (30...Qh2+ 31.Kf1 dxe5 32.Rxe5 Rc8 33.Rc3 Nf6 ) ; 28.Rc7] 28...Rd8 The Rybka chess engine evaluates that Svidler has a cramped position. [Other possible moves include 28...Rd8 and 28...dxe5: Analysis:Deep Rybka(a) 28...Rd8 29.Red1 g5 30.fxg5 (30.Bxh7+ Kxh7 31.fxg5 Qxg5 32.Rc3 Kg8 33.a3 d5=) 30...Nxg5 31.Qxh4 Nf3+ 32.Kh1 Nxh4 33.Bxb5 Rxe5=; (b) 28...dxe5 29.Rxe5 Rxe5 30.Qxe5 b4 31.Rc7 Rd8 32.Bc2 Be6 33.Rb7 Bxa2 34.Rxb4 Be6 ] 29.Rcd1 Ivanchuk now threatens to play 30.Bxb5. [Analysis:Deep Rybka: 29.Red1 Rh6 (29...g5 30.fxg5 Nxg5 31.Qxh4 Nf3+ 32.Kh1 Nxh4 33.Bxb5 Rxe5 34.Bxa4 Be6) 30.Be4 Bd7 31.Qe3 Nf8 32.Rd2 Be6 33.Rxd6 Qh2+ 34.Kf1 Bc4+ 35.Bd3 Qh3+ 36.Ke1 (36.Kg1) 36...Rhxd6 37.exd6 Bxd3 38.Qxd3 Qe6+ 39.Kf1 Rxd6 40.Qxb5 Rb6 41.Qxa4 Rxb2=] 29...Rh6 Svidler overprotects his d-pawn and he also creates threats against Ivanchuk's king. 30.Bxb5 Ivanchuk wins a pawn however after Svidler plays [Analysis:Deep Rybka: 30.Bxh7+ Rxh7 31.Qe4 Be6 32.Rxd6 Qh2+ 33.Kf1 Rc8=] 30...Bg4 By playing this move, Svidler creates a game-ending mating threat: 31...Bf3 32....Qh2#.|
|Dec-11-08|| ||Albertan: 31.Rd3 [Analysis:Note that Svidler's a-pawn is poisoned, it cannot be captured as 31.Qxa4 is refuted by a beautiful mate 31...Bf3 32.Re2 Qh2+ 33.Kf1 Qh1+ 34.Nxh1 Rxh1#; (b)The move 31.exd6 is not to be advocated because of the following mating combination 31...Bf3 32.Qxg7+ Kxg7 33.Nf5+ Kf6 34.Re6+ fxe6 35.Ng3 Qh2+ 36.Kf1 Qh1+ 37.Nxh1 Rxh1#] 31...Nf8 Svidler intends to move the knight to e6. [A few other ideas in this position for Svidler are: 31...Qh2+. 31...Ng5 and 31...Nf6. However, all of these continuations would lead to the game ending in a draw: Analysis: (a) 31...Qh2+ 32.Kf1 Qh3+ 33.Kg1 Qh2 ; (b) 31...Ng5!? 32.fxg5 Qh2+ 33.Kf1 Qh3+ 34.Kg1 Qh2 ; (c) 31...Nf6!? 32.exf6 Qh2+ 33.Kf1 Qh3+ 34.Kg1 Qh2 ] 32.exd6 Ivanchuk gains a dangerous protected and passed pawn. [Other moves Ivanchuk may have considered in this position include:32.Bc4 and 32.Bc6: (a)A variation involving 32.Bc4 is: 32.Bc4 Qh2+ 33.Kf1 Qh3+ 34.Kg1 Bf5=; (b)A continuation involving 32.Bc6 is: 32.Bc6 Rc8 33.Bf3 Bxf3 34.Rxf3 dxe5 35.Qe4 (35.Qxe5?? Qh2+ 36.Kf1 Qh3+ 37.Kg1 Re6 ) 35...Ne6 36.Qxe5 Qh2+ 37.Kf1 Qh3+ 38.Kg1= (‹38.Ke2? Qg4 39.Nf5 Rh5 40.Ne7+ Kf8 41.Qe4 Kxe7 ) ] 32...Ne6 Black threatens to win material: Ne6xd4 [Analysis:Deep Rybka: 32...Rdxd6?! 33.Qxd6 (33.Qxa4 is a bad alternative 33...Qh2+ 34.Kf1 Qh3+ 35.Kg1 Rxd3 36.Bxd3 Bf3 37.Bh7+ Rxh7 38.Qe4 Qg2#) 33...Qh2+ 34.Kf1 Qh3+ 35.Kg1 Qh2+ 36.Kf1 Qh3+ 37.Kg1 Qh2 ] 33.Qe5?? Ivanchuk, probably in time trouble, blunders, and he should have lost the game due to this mistake...however...after [Analysis:Svidler would be winning after: 33.Qe3 Bf5 Mate attack 34.Qe5 Qh2+ 35.Kf1 Rf6 36.Nxf5 Qh1+ 37.Ke2 Qh5+ 38.Kd2 Rxf5 ] 33...Qh2 + 34.Kf1 The only move. 34...Qh3+ [Analysis:Deep Rybka:(a)After the move 34...Rh5 (threatening ...Rxe5)Svidler would be winning: 35.Qxh5 (35.Qe3 Rxb5 36.Rb1 Rb4 37.a3 Nxf4 38.axb4 Bh3+ 39.Ke1 Ng2 +) ; (b)Svidler is also winning after 34...Rf6 35.Re4 Rf5 36.Qc3 Nxf4 37.Qd4 Rxd6 ] 35.Kg1 The only move. 35...Qh2+?? A mistake in a won position, which turns the game into a draw. [Analysis:Svidler would have won had he found the move 35...Rh4: 35...Rh4 Threatening ....Nxf4 36.Re4 Qh2+ 37.Kf1 the only move 37...Rh5 38.Qxh5 (38.Nxh5?? Qh1#; 38.Qc3 Rxb5 ) 38...Bxh5 ] 36.Kf1 The only move. 36...Qh3+?? Twofold repetition Another oversight, missing a win. [Analysis:Deep Rybka:Svidler would have won after: >=36...Rf6 and Black wins 37.Re4 Rf5 38.Rxa4 Rxe5 39.fxe5 Nc5 ] 37.Kg1= Qh2+ The players agreed to a draw. [Analysis:Svidler misses >=37...Rh4 38.Re4 Qh2+ 39.Kf1 Rh5(.) And Ivanchuk would be in Zugswang. 40.Qc3 Rxb5 ] 1/2-1/2|
|Dec-12-08|| ||ganstaman: Nice analysis. I just have a question about this annotation:|
<Albertan: 9...Na5 The main continuation,forcing Ivanchuk to lose a tempo.With 9...Na5 Black chases the white bishop from the a2-g8 diagonal and frees the c-pawn for queenside expansion. 10.Bc2 The lost tempo. >
I don't see how white loses a tempo by playing Bc2, especially since black had to play ...Na5 to force this.
|Dec-20-08|| ||Albertan: Hi ganstaman you are right thanks for correcting me.|