Author: Uri Blass
Date: 06:58:50 12/04/01
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On December 03, 2001 at 21:05:39, Andrew Smith wrote: >[D]r1nq1r1k/p2b1pbp/1p4p1/2pNp3/RP1PP3/4BN1P/2P2PP1/2QR2K1 w KQkq - 0 1 > >dxe5!! apparently gives white a huge adavantage in this position, followed by >Bg5. The line looks to be very long. I played around the position with gambit >tiger and forced the move and followed its analysis some ten moves deep, until >it finally showed a positive score for white. According to this it would have >taken more than twenty plies (!?) in the original position. Can any program find >this move? Is it even possible? Yace only material analysis after dxe5 Bxa4(pawn=0.8,knight=3.4,bishop=3.5,rook=5,queen=10.01) The score at depth 13 is 2.60 against white The score at depth 15 is 1.60 against white I evaluate that depth 19 is going to be enough for it to see positive score for white but I do not promise to continue to analyze to this depth. New position [D]r1nq1r1k/p4pbp/1p4p1/2pNP3/bP2P3/4BN1P/2P2PP1/2QR2K1 w - - 0 1 Analysis by Yace 0.99.56: 2.bxc5 -+ (-3.50) Depth: 1 00:00:09 2.bxc5 bxc5 -+ (-3.50) Depth: 2 00:00:09 2.bxc5 bxc5 3.Bxc5 Rg8 -+ (-3.50) Depth: 3 00:00:10 2.bxc5 bxc5 3.Bxc5 Rg8 4.Bd4 -+ (-3.50) Depth: 4 00:00:12 2.Bg5 Qxg5 3.Nxg5 Bxc2 -+ (-3.49) Depth: 4 00:00:14 2.Bg5 Qe8 3.Nc7 Qc6 -+ (-2.70) Depth: 4 00:00:14 2.Bg5 Qe8 3.Nc7 Qc6 4.Nxa8 -+ (-2.70) Depth: 5 00:00:16 9kN 2.Bg5 Qe8 3.Nc7 Qc6 4.Nxa8 Qxa8 -+ (-2.70) Depth: 6 00:00:22 22kN 2.bxc5 bxc5 3.Bxc5 Qe8 4.Bxf8 Kg8 -+ (-2.69) Depth: 6 00:00:34 52kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 -+ (-2.60) Depth: 6 00:00:35 59kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 5.Rd4 Qb5 -+ (-2.60) Depth: 7 00:00:42 121kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 5.Rd4 Qb5 6.Rd3 -+ (-2.60) Depth: 8 00:00:42 418kN 2.bxc5 Qe8 3.Nc7 Qc6 4.Nxa8 Qxa8 5.cxb6 axb6 6.e6 fxe6 7.Ng5 -+ (-2.70) Depth: 9 00:00:44 1268kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 5.Bd4 Qb5 6.Nd2 f6 7.exf6 -+ (-2.60) Depth: 10 00:00:48 3140kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 5.Bd4 Qb5 6.Nd2 f6 7.exf6 Bxf6 -+ (-2.60) Depth: 11 00:00:55 8248kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 5.Bd4 Qb5 6.Nd2 f6 7.exf6 Bxf6 8.Bxf6+ Rxf6 -+ (-2.60) Depth: 12 00:01:25 27091kN 2.bxc5 Rb8 3.Nxb6 Qe8 4.Nxa4 Qxa4 5.Bd4 Qb5 6.Nd2 f6 7.exf6 Bxf6 8.Bxf6+ Rxf6 9.Qa1 Qc6 -+ (-2.60) Depth: 13 00:02:53 80942kN 2.bxc5 Rb8 3.Bg5 Qe8 4.Bf6 Qc6 5.Bxg7+ Kxg7 6.Nd4 Qd7 7.Nf5+ gxf5 8.Nf6 Bc6 9.Nxd7 Bxd7 -+ (-2.20) Depth: 14 00:08:09 263330kN 2.bxc5 Qe8 3.Nc7 Qc6 4.Nxa8 Qxa8 5.cxb6 Nxb6 6.Re1 Bc6 7.Bc5 Rc8 8.Bxb6 axb6 9.Ng5 -+ (-2.00) Depth: 14 00:19:06 634895kN 2.Bg5 Qe8 3.Bf6 Qc6 4.e6 fxe6 5.Bxg7+ Kxg7 6.Qa1+ Kg8 7.Nf6+ Rxf6 8.Qxf6 Nd6 9.Ne5 Nf7 10.Nxc6 Bxc6 -+ (-1.99) Depth: 14 00:20:50 694408kN 2.Bg5 Qe8 3.Bf6 Qc6 4.e6 fxe6 5.Bxg7+ Kxg7 6.Qa1+ Kg8 7.Nf6+ Rxf6 8.Qxf6 Nd6 9.Ne5 Qc7 10.Qxe6+ Nf7 11.Rd7 Qxe5 -+ (-1.90) Depth: 14 00:21:37 721483kN 2.Bg5 Qe8 3.Bf6 Qc6 4.e6 Qxe6 5.Bxg7+ Kxg7 6.Qa1+ f6 7.Qxa4 Rb8 8.bxc5 bxc5 9.Nc7 Qb6 10.c4 Kg8 11.Rd7 -+ (-1.60) Depth: 15 00:28:39 968855kN (Blass, Tel-aviv 04.12.2001) Uri
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