Author: Uri Blass
Date: 07:37:46 12/04/01
Go up one level in this thread
On December 04, 2001 at 09:58:50, Uri Blass wrote: >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 Yace continues to get progress in score Here is depth 16 results and suddenly it is only 1 pawn for black: 2.Bg5 Qe8 3.Bf6 Qc6 4.e6 Qxe6 5.Qa1 Bxf6 6.Nxf6 Bxc2 7.Ng5 Qc4 8.Nfxh7+ f6 9.Rd8 Kg8 10.Rxf8+ Kg7 µ (-1.20) Depth: 16 00:48:11 1625444kN 2.Bg5 Qe8 3.Bf6 Qc6 4.e6 Qxe6 5.Qa1 Bxf6 6.Nxf6 Qc6 7.Nd7+ f6 8.Nxf8 Bxc2 9.Rd8 Kg7 10.bxc5 bxc5 11.e5 µ (-0.90) Depth: 16 01:01:57 2089740kN (Blass, Tel-aviv 04.12.2001) Uri
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