Author: Vine Smith
Date: 01:45:11 05/11/02
Go up one level in this thread
On a PIII-850, 128 Mb hash: After: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 c5 8.dxc5 Nc6 9.cxd5 exd5 10.Nf3 Bf5 11.b4 b6 12.b5 0-0 13.bxc6 bxc5 14.Bb2 Qa5+ 15.Nd2 Ng3 16.Qc3 Qxc3 17.Bxc3 Nxh1 18.g4 Bxg4 19.Bg2 r4rk1/p4ppp/2P5/2pp4/6b1/P1B5/3NPPBP/R3K2n b Q - 0 1 Analysis by Junior 7: 19...Ng3 20.fxg3 Rfe8 21.c7 +- (1.62) Depth: 3 00:00:00 19...Nxf2 20.Kxf2 Rfe8 21.c7 ± (0.88) Depth: 3 00:00:00 19...d4 20.Ba5 d3 21.exd3 ² (0.35) Depth: 3 00:00:00 19...Rfe8 20.f3 = (0.09) Depth: 3 00:00:00 19...Rfe8 20.f3 = (0.09) Depth: 6 00:00:00 19...Rfe8 20.f3 = (0.09) Depth: 9 00:00:00 10kN 19...Rfe8 20.f3 = (0.09) Depth: 12 00:00:00 197kN 19...Rfe8 20.f3 Bf5 21.Ba5 Re6 = (0.07) Depth: 14 00:00:13 9713kN 19...Rfe8 20.f3 Bf5 21.Ba5 Re6 22.e4 Rc8 23.Bxh1 dxe4 24.c7 exf3+ 25.Kf2 Re2+ 26.Kxf3 = (0.09) Depth: 16 00:01:05 44644kN 19...Rae8 20.f3 Bc8 21.Bxh1 Re3 22.Bb2 Rfe8 23.0-0-0 Rxe2 24.f4 d4 25.Nb3 Rxh2 26.Nxc5 Bg4 27.c7 = (0.07) Depth: 16 00:02:27 98889kN 19...Rae8 20.Nf3 d4 21.Bd2 d3 22.e3 Nxf2 23.Kxf2 Re6 24.c7 Rc8 25.Rb1 c4 26.Nd4 Re7 27.Nb5 a6 28.Nd6 Rexc7 = (0.02) Depth: 17 00:04:50 194653kN 19...Rae8 20.Nf3 d4 21.Bd2 Re6 22.Bxh1 Rfe8 23.e3 Rxc6 24.Nxd4 Rh6 25.Nf3 Rh3 26.Ng5 Rxh2 27.Bd5 Be6 28.Be4 c4 = (0.08) Depth: 18 00:08:51 350811kN 19...Rfe8 20.f3 Bf5 21.Bxh1 Bd3 22.0-0-0 Rxe2 23.c7 d4 24.f4 Rae8 25.Bf3 Rxh2 26.Bc6 Rc8 27.Ba5 Bf5 28.Ne4 Bxe4 = (-0.04) Depth: 18 00:16:01 644805kN 19...Rfe8 20.Nf3 d4 21.Ba5 Rac8 22.h3 d3 23.e3 Bf5 24.c7 Re6 25.Rc1 Be4 26.Rc4 Bxf3 27.Bxf3 Ra6 28.Bb7 Rxa5 = (0.05) Depth: 19 00:28:33 1129093kN 19...Rfe8 20.Nf3 d4 21.Ba5 Rac8 22.c7 d3 23.e3 Re6 24.h3 Bf5 25.Rc1 = (0.16) Depth: 20 01:03:09 2501148kN 19...Rae8 20.Nf3 d4 21.Ba5 Re6 22.h3 d3 23.e3 Bf5 24.c7 Ra6 25.Bc3 Rc8 26.Be5 f6 27.Bh2 Nxf2 28.Kxf2 Rb6 = (0.08) Depth: 20 01:21:14 3222108kN (Smith, Stevenson Ranch 11.05.2002) I think there are a couple of reasons why this line is rejected practically without comment in the books. Having sacrificed a piece in the opening, Black is looking to win by direct attack, and not to be confronted with a difficult technical task as in the position at move 19. Also, since there are apparently no really compelling moves for either side, I imagine the GMs who have investigated this position simply prefer White's two pieces to Black's one rook, and one or two pawns the less for White don't make much difference. The passer on c6 is more than a minor annoyance, too. Regards, Vine Smith
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