Author: Mogens Larsen
Date: 14:19:54 08/20/01
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On August 20, 2001 at 17:05:35, Uri Blass wrote: >Here is some analysis of shredder5.32 p200(64 Mbytes hash tables) > >Diep blundered in the relevant position by Kc5 when g4 is winning. >The surprising thing is that Shredder also cannot see g4 in a reasonable time >and need more than 5 hours on p200 to avoid Kc5 (it probably means that Shredder >with the best hardware of today cannot avoid Kc5 at tournament time control). > >h5 is probably enough to win(I did not analyze it and I may be wrong) but g4 is >the simplest way to win > >I thought that Shredder is better in the endgame than other programs but I doubt >it after seeing that shredder also does the same mistake that Diep did when Deep >Fritz has no problem to find the right move with a winning score. > [D]2b5/7p/P2k4/1P4p1/2Ppp3/5pP1/1N3K1P/8 b - - 0 1 Deep Shredder on a Dual P3-866MHz comp with 64MB hash and only 4-piece Nalimov. Engine: Deep Shredder by Stefan Meyer-Kahlen position: 0 1 10.01 0:00 +0.80 1...g4 2.Ke1 Kc5 3.Kd1 Kb4 4.Kd2 Kb3 5.c5 Kxb2 6.Ke1 (440.614) 477.8 11.01 0:01 +0.55-- 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kxb5 5.Nxc8 e3 6.a7 f2+ 7.Ke2 d3+ 8.Kxe3 f1R (634.982) 483.6 11.01 0:01 +0.25 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kxb5 5.Nxc8 Kxa6 6.Nd6 e3 7.Nf5 Kb5 8.Nxd4+ Kc4 (690.667) 485.7 11.08 0:02 +0.26++ 1...h5 2.Na4 Bg4 3.Ke1 e3 4.c5+ Kd5 5.Nb6+ Kxc5 6.a7 Kxb6 7.Kd1 Kxb5 8.Kc1 f2 (1.428.375) 488.8 11.08 0:03 +0.33 1...h5 2.h4 gxh4 3.gxh4 Kc5 4.Na4+ Kb4 5.Nb6 e3+ 6.Kxf3 Bg4+ 7.Kg3 d3 (1.681.570) 486.9 12.01 0:06 +0.54 1...h5 2.h3 g4 3.hxg4 Bxg4 4.Nd1 Bc8 5.c5+ Kxc5 6.b6 (3.131.744) 490.0 12.08 0:09 +0.55++ 1...Kc5 2.Na4+ Kxc4 3.Nb6+ Kd3 4.Ke1 e3 5.Kf1 (4.758.935) 492.0 12.08 0:11 +0.83 1...Kc5 2.g4 Kb4 3.h3 h6 4.Kg3 Kc3 5.a7 Bb7 6.Nd3 exd3 7.Kh2 Kxc4 (5.644.938) 489.5 13.01 0:14 +0.58-- 1...Kc5 2.Na4+ Kxc4 3.Nb6+ Kd3 4.g4 Bxg4 5.Kg3 e3 6.a7 f2 7.a8Q Kc2 8.Kxg4 f1Q (7.014.434) 491.6 13.01 0:15 +0.28 1...Kc5 2.Na4+ Kxc4 3.Nb6+ Kd3 4.g4 e3+ 5.Kxf3 Bxg4+ 6.Kg3 Kc2 7.Nc4 Be6 8.Nd6 (7.478.338) 492.9 13.02 0:16 +0.29++ 1...h5 2.h3 g4 3.hxg4 Bxg4 4.Nd1 Bc8 5.c5+ Kxc5 6.a7 e3+ 7.Kg1 Bb7 8.Nc3 dxc3 (7.884.898) 481.5 13.02 0:18 +0.64++ 1...h5 2.h3 g4 3.hxg4 Bxg4 4.Nd1 Bc8 5.c5+ Kxc5 6.a7 e3+ 7.Kg1 Bb7 8.Nc3 dxc3 (8.561.020) 471.5 13.02 0:19 +0.85 1...h5 2.h3 g4 3.hxg4 Bxg4 4.Ke1 e3 5.Nd3 f2+ 6.Nxf2 exf2+ 7.Kxf2 (9.328.730) 470.8 14.01 0:28 +0.60-- 1...h5 2.h4 g4 3.Ke1 Kc5 4.Na4+ Kxc4 5.Nb6+ Kd3 6.Nxc8 f2+ 7.Kxf2 Kd2 (13.276.070) 462.5 14.01 0:29 +0.36 1...h5 2.h4 g4 3.Ke1 Kc5 4.Na4+ Kxc4 5.Nb6+ Kxb5 6.Nxc8 Kxa6 7.Nd6 e3 8.Nf5 Kb5 (13.629.055) 463.2 15.01 1:07 +0.36 1...h5 2.h4 g4 3.Ke1 Kc5 4.Na4+ Kxc4 5.Nb6+ Kxb5 6.Nxc8 Kxa6 7.Nd6 e3 8.Nf5 Kb5 (30.312.556) 450.0 15.03 1:18 +0.37++ 1...Kc5 2.Na4+ Kxc4 3.Nb6+ Kd3 4.g4 e3+ 5.Kxf3 Bxg4+ 6.Kxg4 e2 7.Na4 e1Q 8.Nc5+ Kd2 9.a7 Qe2+ 10.Kh3 Qxb5 (35.534.288) 451.3 15.03 1:21 +0.72++ 1...Kc5 2.Na4+ Kxc4 3.Nb6+ Kd3 4.g4 e3+ 5.Kxf3 Be6 6.a7 e2 7.a8Q e1Q 8.Qe8 Kd2 (36.854.533) 452.8 15.03 1:28 +0.72 1...Kc5 2.g4 Kb4 3.h3 h6 4.Kg3 Bxg4 5.hxg4 Kc3 6.a7 Kxb2 7.a8Q e3 8.Kxf3 Kc3 (40.368.280) 453.8 16.01 2:04 +0.59 1...Kc5 2.g4 Kb4 3.h3 Ka5 4.Kg3 e3 5.Kxf3 e2 6.Kxe2 Bxg4+ 7.hxg4 Kb4 (57.035.366) 459.5 16.09 3:08 +0.60++ 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kc3 5.Nxc8 d3 6.a7 d2+ 7.Kf1 (87.487.016) 465.0 16.09 3:16 +0.95++ 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kc3 5.Nxc8 d3 6.a7 d2+ 7.Kf1 (91.310.233) 464.9 16.09 3:35 +1.17 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kc3 5.Nd5+ Kb3 6.Nb6 d3 7.Nd5 Kc4 8.Nb6+ Kxb5 9.a7 Bb7 10.Kf2 (100.997.334) 468.6 17.01 4:10 +1.42++ 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kc3 5.Nd5+ Kb3 6.Nb6 e3 7.h3 gxh3 8.Na4 (116.812.226) 466.0 17.01 5:09 +1.92++ 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kc3 5.Nd5+ Kb3 6.Nb6 e3 7.h3 gxh3 8.Na4 h2 9.Nc5+ Kc2 10.a7 h1Q+ (142.445.250) 459.5 17.01 5:59 +2.88 1...g4 2.Ke1 Kc5 3.Na4+ Kxc4 4.Nb6+ Kc3 5.Nd5+ Kb3 6.a7 Bb7 7.Nf6 Kb4 8.Nxh7 e3 9.Nf6 f2+ 10.Kf1 Kxb5 (163.969.161) 456.7 best move: g5-g4 time: 7:00.281 min n/s: 451.886 CPU 195.6% nodes: 189.919.298 TB: 315 Regards, Mogens
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