Author: Uri Blass
Date: 08:30:12 12/18/02
Go up one level in this thread
On December 18, 2002 at 10:37:08, Howard Exner wrote: >Final position for a Tiger win. Could someone with a tablebase program show the >win here? Thanks. > >[D] 8/8/8/5p2/P4kpp/5P2/3K2P1/8 w - - 1.a4-a5 g4xf3 2.g2xf3 h4-h3 3.a5-a6 h3-h2 4.a6-a7 h2-h1Q 5.a7-a8Q Qh1xf3 and now yace says: 6.Qa8-b8+ Kf4-g4 7.Qb8-g8+ Kg4-h3 8.Qg8-h8+ Kh3-g2 9.Qh8-g7+ Qf3-g4 10.Qg7-b7+ Kg2-g3 11.Qb7-a7 Qg4-e4 12.Qa7-g7+ Kg3-f3 13.Qg7-h7 Qe4-f4+ 14.Kd2-d3 Kf3-g2 15.Kd3-c2 Qf4-f2+ 16.Kc2-c1 f5-f4 17.Qh7-g6+ Kg2-f1 18.Qg6-h6 Qf2-f3 19.Qh6-h7 Qf3-g3 20.Qh7-h1+ Kf1-f2 -+ (-#50) Depth: 62 00:00:00 Not that 5...Qh1-f3 is probably wrong because yace says that 5...Qh1-g2+ is a mate in 48 I also think that ruffian resigned too early because it has no way to know that the opponent use the KQP vs KQ tablebases. programs should implement tablebases correctly and one of the important thing is to evaluate mate in more than 40 moves from tablebases as a score that is less than mate because of the hope that the opponent is going to blunder. > >Earlier in this game this position arose. Ruffian opted for Kf2. >Would not most humans play b4 here. What do other programs play? > >[D] 8/5pp1/7p/p4k2/8/P4PK1/1P4P1/8 w - - Yace(with part of the tablebases) changes it's mind from Kf2 to b4 and can see 0.00 evaluation after enough time. New position 8/5pp1/7p/p4k2/8/P4PK1/1P4P1/8 w - - 0 1 Analysis by Yace 0.99.56: 1.b2-b4 = (-0.06) Depth: 1 00:00:00 1.b2-b4 a5xb4 = (0.20) Depth: 2 00:00:00 1.b2-b4 a5xb4 2.a3xb4 = (0.20) Depth: 3 00:00:00 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.b4-b5 ² (0.26) Depth: 4 00:00:00 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.Kg3-h2 Ke5-d5 4.g2-g3 Kd5-c4 5.Kh2-h1 = (-0.15) Depth: 5 00:00:00 2kN 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.f3-f4+ Ke5-d5 4.f4-f5 Kd5-c4 5.f5-f6 ³ (-0.36) Depth: 5 00:00:00 2kN 1.a3-a4 g7-g5 2.b2-b3 f7-f6 3.Kg3-h3 ³ (-0.32) Depth: 5 00:00:00 2kN 1.a3-a4 g7-g5 2.Kg3-f2 Kf5-f4 3.g2-g4 = (-0.24) Depth: 5 00:00:00 2kN 1.b2-b3 f7-f6 2.b3-b4 Kf5-e5 3.Kg3-f2 = (-0.21) Depth: 5 00:00:00 2kN 1.b2-b3 g7-g5 2.b3-b4 a5xb4 3.a3xb4 = (0.09) Depth: 5 00:00:00 2kN 1.b2-b3 Kf5-e6 2.f3-f4 Ke6-d5 3.b3-b4 a5xb4 4.a3xb4 = (0.12) Depth: 6 00:00:00 7kN 1.b2-b3 g7-g6 2.f3-f4 h6-h5 3.b3-b4 h5-h4+ 4.Kg3xh4 a5xb4 = (0.00) Depth: 7 00:00:00 29kN 1.b2-b3 Kf5-e5 2.f3-f4+ Ke5-d4 3.Kg3-h2 g7-g5 4.f4-f5 Kd4-c3 5.Kh2-g1 ³ (-0.40) Depth: 8 00:00:00 84kN 1.b2-b3 Kf5-e5 2.a3-a4 Ke5-d4 3.Kg3-f4 Kd4-c3 4.g2-g4 Kc3xb3 µ (-0.88) Depth: 8 00:00:00 84kN 1.a3-a4 Kf5-e5 2.Kg3-f2 f7-f6 3.Kf2-e3 h6-h5 4.g2-g4 h5-h4 µ (-0.84) Depth: 8 00:00:00 84kN 1.a3-a4 Kf5-e5 2.Kg3-f2 f7-f5 3.Kf2-e3 f5-f4+ 4.Ke3-d3 g7-g5 ³ (-0.33) Depth: 8 00:00:00 84kN 1.Kg3-f2 f7-f6 ³ (-0.32) Depth: 8 00:00:00 84kN 1.Kg3-f2 Kf5-e5 2.Kf2-e3 Ke5-d5 3.b2-b3 f7-f6 4.g2-g4 g7-g5 = (-0.09) Depth: 8 00:00:00 84kN 1.Kg3-f2 Kf5-e5 2.Kf2-e3 Ke5-d5 3.Ke3-d3 Kd5-c5 4.Kd3-e4 g7-g5 5.g2-g4 = (0.09) Depth: 9 00:00:00 377kN 1.Kg3-f2 Kf5-e5 2.Kf2-e3 a5-a4 3.f3-f4+ Ke5-d5 4.g2-g4 f7-f5 5.g4xf5 h6-h5 = (-0.21) Depth: 10 00:00:01 529kN 1.Kg3-f2 a5-a4 2.Kf2-e3 g7-g5 3.Ke3-d3 Kf5-f4 4.Kd3-e2 f7-f6 5.Ke2-d3 Kf4-g3 6.b2-b4 = (-0.14) Depth: 11 00:00:05 2148kN 1.Kg3-f2 a5-a4 2.Kf2-g3 Kf5-e5 3.Kg3-f2 Ke5-d4 4.Kf2-e2 h6-h5 5.f3-f4 h5-h4 ³ (-0.52) Depth: 12 00:00:07 3256kN 1.Kg3-f2 a5-a4 2.Kf2-g3 g7-g5 3.Kg3-f2 Kf5-f4 4.g2-g3+ Kf4-f5 5.Kf2-e2 h6-h5 6.Ke2-e3 h5-h4 7.g3xh4 g5xh4 8.Ke3-f2 f7-f6 9.Kf2-g2 Kf5-f4 10.Kg2-g1 f6-f5 11.b2-b4 ³ (-0.54) Depth: 13 00:00:15 8190kN 1.Kg3-f2 a5-a4 2.Kf2-g3 g7-g5 3.Kg3-f2 h6-h5 4.Kf2-g3 h5-h4+ 5.Kg3-f2 Kf5-f4 6.Kf2-e2 Kf4-g3 7.Ke2-f1 f7-f5 µ (-0.75) Depth: 14 00:00:32 16936kN 1.b2-b3 Kf5-e5 2.f3-f4+ Ke5-d4 3.f4-f5 Kd4-c3 4.f5-f6 g7xf6 5.b3-b4 a5xb4 6.a3xb4 Kc3-b3 7.Kg3-f4 h6-h5 8.b4-b5 h5-h4 µ (-0.74) Depth: 14 00:00:50 27064kN 1.b2-b3 Kf5-e5 2.f3-f4+ Ke5-d4 3.f4-f5 Kd4-c3 4.f5-f6 g7-g6 5.Kg3-f4 Kc3xb3 6.Kf4-e5 Kb3xa3 7.Ke5-d6 a5-a4 8.Kd6-e7 Ka3-b4 9.Ke7xf7 Kb4-c5 ³ (-0.62) Depth: 14 00:00:54 28679kN 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.f3-f4+ Ke5-d5 4.f4-f5 Kd5-c4 5.Kg3-g4 Kc4xb4 6.Kg4-h5 Kb4-c5 7.f5-f6 g7xf6 8.Kh5xh6 Kc5-d5 9.Kh6-g7 f6-f5 10.Kg7xf7 f5-f4 11.Kf7-g7 Kd5-e4 12.Kg7-f7 f4-f3 ³ (-0.61) Depth: 14 00:01:00 32582kN 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.f3-f4+ Ke5-d5 4.f4-f5 Kd5-c4 5.Kg3-g4 Kc4xb4 6.Kg4-h5 Kb4-c5 7.f5-f6 g7xf6 8.Kh5xh6 Kc5-d5 9.g2-g4 Kd5-e6 10.Kh6-g7 Ke6-e7 11.Kg7-h6 Ke7-d7 12.Kh6-h5 Kd7-e7 13.g4-g5 ³ (-0.40) Depth: 14 00:01:03 34131kN 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.f3-f4+ Ke5-d5 4.f4-f5 Kd5-c4 5.Kg3-g4 Kc4xb4 6.Kg4-h5 Kb4-c5 7.f5-f6 g7xf6 8.Kh5xh6 Kc5-d5 9.g2-g4 Kd5-e6 10.Kh6-g7 Ke6-e7 11.Kg7-g8 f6-f5 12.g4xf5 f7-f6 = (-0.03) Depth: 15 00:01:28 46606kN 1.b2-b4 a5xb4 2.a3xb4 Kf5-e5 3.f3-f4+ Ke5-d5 4.f4-f5 Kd5-c4 5.Kg3-g4 Kc4xb4 6.Kg4-h5 Kb4-c5 7.f5-f6 g7xf6 8.Kh5xh6 f6-f5 9.g2-g3 f7-f6 10.Kh6-h7 f5-f4 11.g3xf4 Kc5-d5 12.Kh7-g7 Kd5-e6 13.Kg7-h7 f6-f5 14.Kh7-g7 Ke6-e7 15.Kg7-h7 Ke7-f7 = (0.00) Depth: 16 00:02:25 73859kN (Blass, Tel-aviv 18.12.2002) Uri
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