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Alexei Fedorov vs Vasyl Ivanchuk
Aeroflot Open (2005), Moscow RUS, rd 2, Feb-16
Sicilian Defense: Classical Variation. General (B56)  ·  0-1

8
7
6
5
4
3
2
a
1
b
c
d
e
f
g
h
White to move.
ANALYSIS [x]
Notes by Stockfish 9 v010218 (minimum 6s/ply)11...Na7 was played in J Baules vs A R Saleh Salem, 2010 (0-1)better is 12.Kb1 d5 13.exd5 Nbxd5 14.Nxd5 Nxd5 15.Bc4 Nxe3 16.Qxe3 = +0.48 (26 ply) 12...Qc7 13.Bg5 a4 14.Bxa4 Rxa4 15.Bxf6 Bxf6 16.axb4 Ra6 = -0.03 (24 ply) ⩲ +0.83 (25 ply) 14.Bxd4 exd4 15.Qxd4 axb4 16.Qxd8 Rfxd8 17.Ne2 Bxb3 ⩲ +0.81 (24 ply)= -0.12 (26 ply) 18.Bd2 b3 19.Bc3 Ne8 20.g3 Nd6 21.Be2 b5 22.cxb3 Bxb3 = -0.16 (25 ply) ⩱ -1.45 (25 ply) 22...Ra1 23.Rxd7 Bxd7 24.Bxc5 Ba4 25.Re1 Rxc5 26.c4 Kf8 ∓ -1.70 (24 ply) ⩱ -0.77 (28 ply)better is 25.Rd2 f6 26.Kf2 Nf8 27.Bd3 Ng6 28.Ke3 Ne5 29.Rxa2 Bxa2 ⩱ -0.86 (27 ply) ⩱ -1.47 (28 ply) after 25...Bc4 26.Bxc4 Rxc4 27.Nd2 Rc7 28.Kd1 Nc5 29.Rc2 Ra3 better is 26.Nd2 Rxd4 27.Nxb3 Rd6 28.Nd2 Ne5 29.c4 Nd3+ 30.Bxd3 ⩱ -1.07 (27 ply) ∓ -1.77 (27 ply) 29.Bd6 Ra1 30.c4 Ba2 31.Bd3 Nc5 32.Bxc5 Rxc5 33.Kd2 Bxb1 ∓ -1.62 (23 ply) ∓ -2.41 (25 ply)34.Bd6 Rc6 35.c5 Ba2 36.Rc2 Bxb1 37.Rb2 Ra3+ 38.Kf4 Bd3 -+ -3.12 (25 ply)0-1

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
FEN COPIED

Annotations by Stockfish (Computer).      [35435 more games annotated by Stockfish]

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Kibitzer's Corner
Feb-17-05  AdrianP: Is this really a Najdorf 5. ...a6?
Feb-17-05  AdrianP: Looks more B56 than B90 to me...
Feb-18-05  patzer2: I think Federov could have drawn after 16. Bxd4 axb4 17. Ng1, per the following analysis by Fritz 8 @ 17 depth:

1. (0.50): 17...Nxe4 18.fxe4 Bg5+ 19.Rd2 Ra1 20.c3 bxc3 21.Bxc3 f5 22.Bd3 Rd8 23.exf5 Bxd2+ 24.Bxd2 Ba2

2. (0.66): 17...Rfc8 18.Rhe1 Ra5 19.Bd3 Ra2 20.f4 Nd7 21.Kd2 Bg4 22.Rc1 Bc5

In the better line,Black should be able to force a drawish opposite color Bishop Ending, but appears to have no winning chances.

Nov-10-07  nolanryan: Somehow this variation happened in a tournament game of mine. I remembered this Ivanchuk game, played 11 ..Nb4 12. a3 d5 immediately, and ended up getting a winning position after my opponent wimped out and played 13. exd5
Nov-24-24
Premium Chessgames Member
  plang: 11 0-0-0 is often played by White in the English Attack usually reached through the Najdorf. Ivanchuk, in this game, uses a strategy that cleverly points out the drawbacks to playing the English Attack against the Boleslavsky line (..Nc6 and..e5). 14 Bf2..axb 15 Na4..Nxe4! 16 Qe2 (16 fxe..Bxb3 17 cxb..Bg5 18 Be3..Bxe3 19 Qxe3..Qc7+ wins for Black) 16..Nxf2 17 Qxf2..Qd5 18 Qe2..Rfc8 19 Kb1..Bf5 would have given Black good compensation for the piece. 14 Bxd4 had been played once before; 14 Nxd4 was new but probably was not an improvement. White quickly lost material after 18 c4?; 18 Rdd1 or 18 Rhd1 would have been better. 19 Ra4..cxb+ 20 Kxb2..Rxa4 21 Bxa4..Nxe4! 22 fxe..Bf6+ 23 Kc3..Ra8 24 Kb4..Be7+ would have been strong for Black. 29 Bd6 would have been a tougher defense.

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