Mikhail Gurevich vs Dorian Rogozenco (2001)

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Mikhail Gurevich vs Dorian Rogozenco
FIDE World Championship Tournament (2001/02), Moscow RUS, rd 1, Nov-27
Nimzo-Indian Defense: Classical. Berlin Variation Pirc Variation (E39) · 1-0

ANALYSIS [x]

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Dec-07-19		plang: A few months later at the 2002 European Championship Marin tried 10..h6 against Gurevich (game not included in this database) but White won after a long struggle.

Sep-26-20		Walter Glattke: The walnut for white is, that 24.Nxd5 exd5 25.Bxd5 wins material because of Nd8? Bxb7

Sep-26-20		Walter Glattke: No, now Qc7, so 24.Nxd5 exd5 25.Bxd5 Nd8 26.Bxf7+ Nxf7 27.Rd7 Nd6 28.Rxc7 Rxc7 29.cxd6 therefore 24.Nxd5 Qb7 (there she is) 25.Nxb6 Rc7 26.Qxe6 quite desperate, too.

Sep-26-20		An Englishman: Good Evening: Knew the text move was probably best, but could not resist the temptation of preferring 25.Rxd5,exd5; 26.Nxd5. Given the choice of sound + fun vs. unsound + fun, too frequently chose the latter during my playing career.

Sep-26-20		Walter Glattke: The change 24.Nxd5 exd5 25.Bxd5 bxc5 allows 26.Bxc6 Qxc6 27.Rd7 c4, so 26.Be6 threatens Rd7 26.-Nd6!? 27.bxc5, that cracks the black constellation I would not play 27.Rxd6. 27.-Nd8 28.Rxd6 or 27.-Ne4 28.Rd7 Nc5 (aha!) 29.Bxf7+ Kh8 30.Rxc7 Nxb3 31.Rxc8 hope. I made not too much mistakes with this.

Sep-26-20		stacase: 25.Nxd5 nets the two center Pawns for a Knight and seems to be a pretty good deal. Should be enough to win. I would have moved 27.Bxf6.

Sep-26-20		NM JRousselle: N,B or R captures on d5 all work.

Sep-26-20		RandomVisitor: <NM JRousselle> points out that several moves appear to work, for example: click for larger view Stockfish_20092110_x64_modern: 45/74 21:19 +6.71 25.Bxd5 exd5 26.Nxd5 Qb8 27.Nxb6 Be7 28.Nxc8 Qxc8 29.a4 h5 30.b5 axb5 31.axb5 Na5 32.Qa2 Qxc5 33.Qxa5 h4 34.Rd5 Qc2 45/70 21:19 +5.40 25.Nxd5 exd5 26.cxb6 Qxb6 27.Bxd5 Nd8 28.Bh4 Nf6 29.Bc4 Rxc4 30.Qxc4 Ne6 31.Bxf6 Rxf6 32.Rd8 h6 33.R1d7 a5 34.Rc8 axb4 44/73 21:19 +5.01 25.cxb6 Nd4 26.Rxd4 Qxc3 27.Qxc3 Rxc3 28.a4 Ra3 29.a5 Rb3 30.Rc1 Bxb4 31.Rc8 Kf8 32.Bd1 Rb1 33.Kg2 Bxa5 34.Ba4 Re7 44/67 21:19 +3.82 25.e4 bxc5 26.exd5 Nd4 27.Rxd4 cxd4 28.dxe6 Re7 29.Ne2 Nf6 30.Kg2 d3 31.Rxd3 Qc2 32.Qxc2 Rxc2 33.Rd6 a5 34.bxa5 Re8

Sep-26-20		agb2002: White has the bishop pair for a bishop and a knight. The most promising sacrifice on d5 (Bxd5, Nxd5 or Rxd5) seems to be 25.Bxd5: A) 25... exd5 26.Nxd5 A.1) 26... Qb7 27.Nxb6 A.1.a) 27... Rcc7 28.Rd7 Ne7 (28... Rcxd7 29.Rxd7 wins) 29.Rxc7 Qxc7 30.Rd7 followed by Bh4 looks winning. A.1.b) 27... Nf6 28.Nxc8 Qxc8 29.Bh4 Nb8 30.Bxf6 gxf6 31.Rd8 followed by a pawn roll a4-b5, etc. A.2) 26... Qb8 27.Nxb6 looks similar to A.1. B) 25... Bxc5 26.Bxe6 wins decisive material.

Sep-26-20		Brenin: The focus is clearly d5, and the only question is, which piece to sacrifice, and which to retain? It is clear that White wants the B, supported by doubled Rs, on d5, so 25 Nxd5 exd5 (nothing else looks plausible) 26 Bxd5, pinning the R on f7. Black tries to regain a P with 26 ... bxc5 (again, what else?) and now 27 Be6 threatens 28 Rd7. Black tries to block the d-file with 28 ... Nd6, whereas forcing White to block it with 28 ... Nd4 29 exd4 would have been better. Now White sacs the exchange with 29 Rxd6 Bxd6 30 bxc5, whereas an immediate 29 bxc5 would have retained extra firepower. Either way, after Rd7 it's curtains for Black, and an early resignation would have been reasonable.

Sep-26-20		mel gibson: I thought 25. Nxd5 as per the text. However Stockfish 12 disagrees and says: 25. Bxd5 (25. Bxd5 (♗f3xd5 e6xd5 ♘c3xd5 ♕c7-b7 ♘d5xb6 ♖c8-c7 ♖d2-d7 ♘c6-e7 ♖d7xc7 ♘e8xc7 ♘b6-c4 ♘e7-g6 ♘c4-d6 ♗f8xd6 c5xd6 ♘g6-f8 d6-d7 ♘c7-e6 d7-d8♕ ♘e6xd8 ♖d1xd8 h7-h6 ♕b3-d5 ♕b7xd5 ♖d8xd5 ♘f8-d7 ♖d5-a5 ♖f7-f6 ♗g3-h4 ♖f6-b6 ♗h4-d8 ♖b6-c6 ♖a5-d5 ♘d7-f8 a3-a4 ♖c6-c4 ♗d8-e7 ♘f8-e6 b4-b5 a6xb5 a4xb5 ♘e6-c7 ♖d5xf5 ♘c7xb5 ♖f5xb5 ♔g8-f7 ♗e7-b4 ♖c4-c2 ♔g1-g2) +6.22/41 206) score for White +6.22 depth 41. If I force Stockfish 12 to follow the text then: 25. Nxd5 exd5 (25. .. exd5 (e6xd5 c5xb6 ♕c7xb6 ♗f3xd5 ♘c6-d8 ♗g3-h4 ♕b6-g6+ ♔g1-h1 ♔g8-h8 ♗h4xd8 ♖f7-d7 ♗d5-f3 ♘e8-d6 ♗d8-a5 ♘d6-e4 ♗f3xe4 ♖d7xd2 ♖d1xd2 f5xe4 h2-h3 ♖c8-c1+ ♖d2-d1 ♖c1-c8 ♔h1-h2 ♗f8-e7 a3-a4 ♗e7-h4 ♖d1-g1 ♕g6-c6 ♖g1-g2 ♕c6-c4 ♕b3-d1 ♗h4-f6 ♕d1-d7 h7-h6 ♗a5-b6 ♖c8-g8 ♕d7-b7 a6-a5 ♗b6-c5 ♕c4-c2) -5.21/38 89) score for Black -5.21 depth 38 So there's not much difference between taking with either the Knight or Bishop.

Sep-26-20		bright1: How did Gurevich win with such a bad bishop?

Sep-26-20		malt: Looked at 25.N:d5, but went with 25.cb6 Q:b6 26.N:d5 ed5 27.B:d5 Rcc7 28.B:f7+R:f7 29.Bh4 Be7 30.Qe6 Kf8 31.B:e7 R:e7 32.Q:f5+ Nf6 33.Rd6 Qb7 34.Qc5 Na7 35.Re6 Kf7

Sep-26-20		Brenin: <mel gibson>: Who am I to argue with Stockfish, but surely after 25 Nxd5 exd5, 26 Bxd5 is better than 26 cxb6 Qxb6 27 Bxd5, which means that an eventual Rd7 by White no longer gains a tempo by attacking the Black Q?

Sep-26-20		cormier: RandomVisitor: Stockfish_2009 d45 +6.71 25.Bxd5 exd5 26.Nxd5 Qb8 27.Nxb6 Be7 28.Nxc8 Qxc8 29.a4 h5 30.b5 axb5 31.axb5 Na5 32.Qa2 Qxc5 33.Qxa5 h4 34.Rd5 Qc2 d45 +5.40 25.Nxd5 exd5 26.cxb6 Qxb6 27.Bxd5 Nd8 28.Bh4 Nf6 29.Bc4 Rxc4 30.Qxc4 Ne6 31.Bxf6 Rxf6 32.Rd8 h6 33.R1d7 a5 34.Rc8 axb4

Sep-26-20		Mortadulo: I kept looking at 25. Rxd5 exd5 26. Nxd5 where White has what feels like an effortless grip on the position

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