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Thursday, March 5, 2009

Analysis of Carlsen-Grischuk:round 12 html version

For those of you who prefer an html version of my analysis here it is:

Carlsen,Magnus (2776) - Grischuk,Alexander (2733) [B85]
Linares 2009 Linares (12), 05.03.2009
[Zappa Mexico II]

B85: Sicilian Scheveningen: 6 Be2 a6, lines with early Be3 Opening:Sicilian Defense:Scheveningen variation:classical 1.e4 c5 The Sicilian Defense. 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 The opening begins as a Najdorf variation but will tranpose. 6.Be2 A classical approach,simply developing the bishop so he can castle. 6...e6 This move defines the variation:it is the Schevenigen.Grischuk has a "little center" consisting of his d- and e-pawns. He must decide when to try and advance these pawns. 7.0-0 The most-often-played-continuation. 7...Be7 Simply developing another piece to faciliate kingside castling. 8.a4 Prophalactic, preventing Grischuk from playing the move ....b5 to gain queenside counterplay. 8...Nc6 Developing another minor piece,which creates tension in the center. 9.Be3 The most often played continuation,completing the development of his minor pieces, and in the process overprotecting his knight on d4. 9...0-0 10.f4 Gaining space on the kingside. 10...Qc7 Overprotecting the e5-square. 11.Kh1 Re8 Centralizing his rook. Grischuk intends to play his bishop back to f8 in order to give more protection to his e-pawn. 12.Bf3 The most popular continuation, creating pressure against Grischuk's queen's knight. 12...Bf8 13.Qd2 Connecting his rooks. 13...Rb8 Taking his rook off the same diagonal as Carlsen's light-squared bishop. By playing this move he hopes to advance his b-pawn in the future. [Analysis:In this position the move 13...Na5 is more popular.] 14.Qf2 Moving his queen from its central location where it might have been attacked if Grischuk had played ....Rd8 in the future.Carlsen now threatens to play a5 which would prevent Grischuk from playing ...Rd8. [Analysis:The other main idea in this position is to play 14.Rad1 ] 14...e5 Opening up the diagonal for his light-squared bishop. This comes at the cost of creating a hole on d5. [Analysis:The main continuation in this position is 14...Bd7 ] 15.fxe5N This move appears to be a theoretical novelty for the position.Carlsen creates a half-open file for his queen-rook battery to attack the black king position. [The only moves I have White playing in this position are: (a) 15.Nde2 b5 (15...exf4 16.Bb6 Qe7 17.Nxf4 Be6 18.Rad1 g6 19.Qd2 Ne5 20.Be2 Rbc8 21.Bf2 h6 22.h3 Rc6 23.Bh4 g5 24.Nxe6 Qxe6 25.Bg3 Nc4 26.Qd4 Bg7 27.Bxc4 Rxc4 28.Qxd6 Qxd6 1/2-1/2 Adams,M (2741)-Anand,V (2786)/Linares 2005/CBM 106) 16.axb5 axb5 17.f5 Nb4 18.Ng3 Nxc2 (18...Bb7 19.Qd2 Nxc2 20.Qxc2 b4 21.Bg5 Be7 22.Qd2 bxc3 23.bxc3 Rec8 24.Bxf6 Bxf6 25.Nh5 Qe7 26.Nxf6+ Qxf6 27.Ra7 h6 28.h3 Bc6 29.Rd1 Rd8 30.Rc7 Ba4 31.Ra1 Bb3 32.Qd3 Rbc8 33.Raa7 Burg,T (2301)-Muhren,B (2334)/Hengelo 2007/CBM 119 ext/1/2-1/2 (35)) 19.Bg5 Nxa1 20.Bxf6 Qc5 21.Qd2 Nb3 22.Qg5 h6 23.Qg4 g6 24.Nd5 Nd4 25.Bg5 Qxd5 26.exd5 Bxf5 27.Nxf5 gxf5 28.Qh5 hxg5 29.Be4 Bg7 30.Bxf5 Jakovenko,D (2709)-Rublevsky,S (2699)/Poikovsky 2008/CBM 125/1/2-1/2 (67); and (b) 15.Nb3 Grischuk had played the white side of a game involving 15.Nde2 against Rublevsky in 2007.; 15.Nde2 Nb4+/=] 15...dxe5= Attacking Carlsen's knight,winning a tempo. [Analysis:Deep Rybka 3 preferred to recapture with the knight: 15...Nxe5 with a possible continuation being: 16.Bg5 Nfg4 17.Qg1 f6 18.Nd5!? Qf7 19.Bd2 Qh5 20.b3 Bd7 +=] 16.Nb3 The lost tempo. [Analysis:Deep Rybka 3:The program preferred to play: 16.Qg3!? taking advantage of the pin against the black queen with a possible continuation being: 16...Nxd4 17.Bxd4 Bd7 18.Be3 Be6 19.a5 Bb4 20.Bh6 Bf8 =] 16...Nb4 Grischuk takes advantage of the fact that this knight cannot be displaced by a white pawn, in order to pressure Carlsen's c-pawn. This ties down Carlsen's queen to defend this pawn. [Analysis:The program gave a better evaluation to 16...Be6 (guarding the d5-square) with a possible continuation being: 17.Bb6 Qc8 18.Nd5 Bxd5 19.exd5 Nb4 20.c3 e4!? 21.cxb4 exf3 22.Qxf3 Qd7 23.Bd4 Qxd5 24.Bxf6 Qxf3 25.Rxf3 gxf6=; 16...Be6 17.Bb6 Qd6 18.a5+/=] 17.Ba7 Attacking the rook winning a tempo. [Analysis:Deep Rybka 3 and Deep Hiarcs: 17.Bb6 Qe7 18.Bc5 (Deep Hiarcs: 18.Rad1 Bg4 19.Bc5 Qe6 20.Nd5 Nbxd5 21.exd5 Qd7 22.Bxf8 Rxf8 23.Bxg4 Qxg4=) 18...Qc7 19.Ba7 Ra8 20.Bb6 Qe7 21.Bc5 Qc7 =; 17.Bb6 Qe7+/=] 17...Ra8 The only square available for the rook. 18.Bb6 White threatens to win material: Bb6xc7 18...Qe7 White has a very active position Overprotecting his e-pawn and also preventing Carlsen from playing 19.Qc5. 19.Rad1 Gaining control of the open file. [Analysis:Deep Rybka 3: 19.Rad1 Bg4 20.Bxg4 Nxg4 21.Qg3 Qe6 22.a5 Qg6 23.Rd7 Nf6 24.Qxg6 hxg6 25.Rxb7 Nxc2 =] 19...Be6?! This idea will allow Carlsen to gain an advantage with his next move. [Analysis:Deep Rybka 3:The program gave a better evaluation to: 19...Bg4 with a possible continuation being: 20.Bxg4 Nxg4 21.Qg3 Qe6 22.a5 Qg6 23.Rd7 Nf6 24.Qxg6 hxg6 25.Rxb7 Nxc2 =; 19...Bg4 20.Bxg4 Nxg4 21.Qf5+/=] 20.Nd5+/- Attacking Grischuk's queen,which forces Grischuk to either spend a tempo moving his queen or exchange off pieces on d5. 20...Bxd5 [Analysis: (a)Worse is capturing with the King's knight due to: 20...Nfxd5? 21.exd5 Nxd5 22.Bxd5 Bxd5 23.Rxd5 Qe6 +-; (b)Also worse is recapturing with his knight on b4 due to: 20...Nbxd5? 21.exd5 e4 22.dxe6 exf3 23.exf7+ Qxf7 24.Qxf3 Re6 25.Be3 Rae8 26.Bf2] 21.exd5 Carlsen and Grischuk now both have protected -passed pawns. 21...e4 Advancing his pawn up the board, which attacks the white bishop,threatening to win a tempo. [Analysis:DeepRybka 3: 21...e4 22.d6 Qe5 23.d7! Nxd7 24.Rxd7 exf3 25.Qxf3 f6 26.Nd4 Qe4 27.Qxe4 Rxe4 28.Rxb7 Rc8 29.g3 Nxc2 30.Rc1 Re1+ 31.Rxe1 Nxe1 +=] 22.d6!? By attacking the more valuable queen, Carlsen wins a tempo. 22...Qe6 The lost tempo, however now Grischuk threatens to play ...Bxd6.Deep Rybka gave this move a poor evaluation ?! or ? [Analysis:Deep Rybka 3:Better is 22...Qe5 23.d7! Nxd7 24.Rxd7 exf3 25.Qxf3 f6 26.Nd4 Qe4 +=] 23.Nc5 Forking Grischuk's queen and b-pawn, forcing Grischuk to spend a tempo moving his queen. [Deep Rybka 3: 23.Nc5 0.62/14 Qf5 24.Be2 Qxf2 25.Rxf2 Nbd5 26.Rxf6 !? 26...Nxf6 27.a5 g6 +/-] 23...Qf5 Double-attacking Carlsen's bishop. 24.Be2 Carlsen spends a tempo to save his bishop. [Analysis:Deep Rybka 3 gave a better evaluation to the move 24.c3 with a possible continuation being: 24...Nd3 25.Rxd3!? (25.Nxd3 exf3 26.Nc5 Nd7 27.Nxd7 fxg2+ 28.Qxg2 Qxd7 29.Bc7 Re6 +=) 25...exd3 26.Qd4 Re2 !? 27.Bxe2 dxe2 28.Rxf5 e1Q+ 29.Qg1 the only move 29...Qd2 30.Nxb7 Rb8 31.Na5 Qxd6 32.Bd4 Qd7 with sufficient compensation for the pawn.] 24...Qxf2 Simplying the position. 25.Rxf2 Nbd5 [Analysis:Deep Rybka 3:Worse is 25...Nfd5 26.Ba5 Ne3 27.Rd2 Nexc2 28.Rf4 Nd3 29.Bxd3 exd3 30.Rxd3 b6 31.d7 Bxc5 32.dxe8Q+ Rxe8 +/-; 25...Nfd5 26.Ba5 e3 27.Rf5+-] 26.a5+/- Nxb6 27.axb6 Rab8 28.Rxf6! Decoy: f6 28...gxf6 29.Nd7 f5 [29...Red8 30.Nxb8 (‹30.Nxf6+ Kg7 31.Nxe4 Rbc8=) 30...Rxb8 31.c4+/-] 30.c4 [30.Nxb8 Rxb8 31.c4 Bh6+/-] 30...a5 [30...Bh6 31.Nxb8 Rxb8 32.c5+/-] 31.c5 Bg7?? another bit of territory lost [>=31...Bh6+/-] 32.Nxb8+- Rxb8 33.Ba6! Boing! 33...Bf6 [33...bxa6 34.c6 Passed pawn; /\33...-- 34.Bxb7 Rxb7 35.c6 Passed pawn] 34.Bxb7! the end, the rest is history 34...Rxb7 35.c6 [35.Rc1!? makes it even easier for White 35...Kg7 36.c6 Rxb6+-] 35...Rxb6 36.Rc1 Bxb2 [36...Rxc6 37.Rxc6 Kg7+-] 37.d7 [37.d7 Bf6 38.c7+-] 1-0

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