Author: Roy Eassa
Date: 13:38:46 02/08/02
Go up one level in this thread
Agreeing that Ali's puzzle is too hard for computers to find in a reasonable length of time, how long does it take your favorite program to find 4.Bd3+ and see that it is winning? Here's Fritz 7b on a 1.2 GHz Athlon: [d] r1bq1r2/p2np2k/3p4/3pP3/2pP3N/4Q3/PP4P1/2KR1B2 w - - 0 1 4.Bxc4 Qc7 5.Qd3+ Kh8 6.Ng6+ Kg7 7.Nxf8 Qxc4+ 8.Qxc4 dxc4 9.Ne6+ Kg6 -+ (-1.81) Depth: 7/24 00:00:00 133kN 4.Bxc4 Qc7 5.Qd3+ Kh8 6.Ng6+ Kg7 7.Nxf8 Nxf8 8.exd6 Qxc4+ 9.Qxc4 -+ (-2.03) Depth: 8/26 00:00:00 245kN 4.Qg5! -+ (-2.00) Depth: 8/26 00:00:00 310kN 4.Qg5! -+ (-1.84) Depth: 8/26 00:00:00 324kN 4.Qg5! -+ (-1.53) Depth: 8/26 00:00:00 354kN 4.Qg5! µ (-0.90) Depth: 8/26 00:00:00 421kN 4.Qg5! ³ (-0.62) Depth: 9/28 00:00:01 750kN 4.Qg5! ³ (-0.34) Depth: 9/28 00:00:01 959kN 4.Qg5 Nf6 5.Nf3 Kh8 6.exf6 exf6 7.Qh6+ Kg8 8.Qg6+ Kh8 9.Qh6+ Kg8 10.Qg6+ Kh8 11.Qh6+ = (0.00) Depth: 9/31 00:00:03 1812kN 4.Qg5 e6 5.Qg6+ Kh8 6.Qh6+ Kg8 7.Qg6+ Kh8 8.Qh6+ Kg8 9.Qg6+ Kh8 10.Qh6+ Kg8 11.Qg6+ = (0.00) Depth: 10/32 00:00:10 5650kN 4.Qg5 e6 5.Qg6+ Kh8 6.Qh6+ Kg8 7.Qg6+ Kh8 8.Qh6+ Kg8 9.Qg6+ Kh8 10.Qh6+ Kg8 11.Qg6+ = (0.00) Depth: 11/35 00:00:25 12167kN 4.Qg5 e6 5.Qg6+ Kh8 6.Qh6+ Kg8 7.Qg6+ Kh8 8.Qh6+ Kg8 9.Qg6+ Kh8 10.Qh6+ Kg8 11.Qg6+ = (0.00) Depth: 12/36 00:01:01 28025kN 4.Qg5 e6 5.Qg6+ Kh8 6.Qh6+ Kg8 7.Qg6+ Kh8 8.Qh6+ Kg8 9.Qg6+ Kh8 10.Qh6+ Kg8 11.Qg6+ = (0.00) Depth: 13/37 00:02:38 80422kN 4.Bd3+! = (-0.03) Depth: 13/41 00:03:43 117419kN 4.Bd3+! = (0.13) Depth: 13/41 00:03:58 125961kN 4.Bd3+! ² (0.44) Depth: 13/41 00:04:15 135503kN 4.Bd3+! ± (0.72) Depth: 14/40 00:06:49 226362kN 4.Bd3+! ± (1.00) Depth: 14/40 00:07:29 249570kN 4.Bd3+ cxd3 5.Qxd3+ Kh8 6.Rh1 Rf1+ 7.Qxf1 Kg8 8.Qf3 Nf8 9.Qg3+ Kf7 10.Rf1+ Ke8 11.Qg8 +- (1.44) Depth: 14/41 00:09:01 301594kN
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