Author: John Merlino
Date: 08:42:59 12/20/04
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On December 20, 2004 at 04:53:42, Peter McKenzie wrote: >[D]8/p7/7p/4k1p/6PP/P3K3/8/8 w - - > >White to play and draw. > >I saw this one in Informator 45 (1988). >1.a4 gxh4 2.a5! is the drawing line given. > >Warp doesn't get it but maybe other programs do. Tablebases could be a big help >here. CM9_SKR on a P4-2.4 needs 0:09 to find the move, but does not give it a drawing score: Time Depth Score Positions Moves 0:00 13/17 -2.26 137292 1.h5 a6 2.a4 a5 3.Kf3 Kd4 4.Kf2 Kc4 5.Ke3 Kb3 6.Kd3 Kxa4 7.Kc3 Kb5 8.Kd3 a4 9.Kd4 0:00 14/18 -2.54 192400 1.h5 a6 2.a4 a5 3.Kf3 Kd4 4.Kf2 Kc4 5.Ke3 Kb3 6.Kd3 Kxa4 7.Kc4 Ka3 8.Kd4 Kb3 9.Ke4 a4 10.Kd4 0:00 15/19 -4.07 282044 1.h5 a6 2.a4 a5 3.Kf3 Kd4 4.Kf2 Ke4 5.Kg3 Ke3 6.Kg2 Kf4 7.Kh3 Kf3 8.Kh2 Kxg4 9.Kg2 Kxh5 10.Kg3 Kg6 0:01 15/19 -3.07 680695 1.hxg5 hxg5 2.Kf3 Kd4 3.a4 a5 4.Kf2 Kc4 5.Ke3 Kb4 6.Kd2 Kxa4 7.Kc1 Kb3 8.Kb1 a4 9.Ka1 a3 10.Kb1 a2+ 11.Ka1 Ka3 0:01 16/20 -3.16 842268 1.hxg5 hxg5 2.Kf3 Kd4 3.a4 a5 4.Kf2 Kc4 5.Ke3 Kb4 6.Kd2 Kxa4 7.Kc1 Kb4 8.Kc2 a4 9.Kb2 a3+ 10.Ka2 Ka4 11.Kb1 Kb3 0:02 17/21 -3.01 1159182 1.hxg5 hxg5 2.Kf3 Kd4 3.a4 a5 4.Kf2 Kc4 5.Ke3 Kb4 6.Kd2 Kxa4 7.Kc1 Kb4 8.Kc2 a4 9.Kb2 a3+ 10.Ka1 Kb5 11.Kb1 Kc5 12.Ka2 0:02 18/22 -3.07 1464434 1.hxg5 hxg5 2.Kf3 Kd4 3.a4 a5 4.Kf2 Kc4 5.Ke3 Kb4 6.Kd2 Kxa4 7.Kc1 Kb4 8.Kb2 a4 9.Ka2 a3 10.Kb1 Kb3 11.Ka1 Kc4 12.Ka2 0:09 18/22 -2.64 3929092 1.a4 gxh4 2.a5 Kd6 3.Kf2 Ke7 4.Kg2 Kf6 5.Kh3 Kg5 6.a6 h5 7.gxh5 Kxh5 8.Kg2 Kg4 9.Kh2 h3 10.Kg1 Kg5 11.Kh2 Kh4 12.Kg1 0:17 19/23 -2.81 6217067 1.a4 gxh4 2.a5 Kd6 3.Kf2 Ke7 4.Kg2 Kf6 5.Kh3 Kg5 6.a6 h5 7.gxh5 Kxh5 8.Kg2 Kg4 9.Kh2 h3 10.Kg1 Kg5 11.Kh1 Kh5 12.Kg1 Kg4 0:33 20/24 -2.90 10666977 1.a4 gxh4 2.a5 a6 3.Kf3 Ke6 4.Kg2 Kf6 5.Kh2 Kg6 6.Kg2 Kg5 7.Kh3 h5 8.gxh5 Kxh5 9.Kh2 Kg4 10.Kg2 h3+ 11.Kg1 Kg5 12.Kh1 Kh5 13.Kg1 Kg4 1:08 21/25 -2.76 21009225 1.a4 gxh4 2.a5 a6 3.Kf3 Ke6 4.Kg2 Kf6 5.Kh2 Kg6 6.Kg2 Kg5 7.Kh3 h5 8.gxh5 Kxh5 9.Kh2 Kg4 10.Kg2 h3+ 11.Kg1 Kg5 12.Kh1 Kh5 13.Kg1 Kg4 14.Kh2 2:17 22/26 -2.47 41663822 1.a4 gxh4 2.a5 a6 3.Kf3 Ke6 4.Kg2 Kf6 5.Kh2 Kg6 6.Kg2 Kg5 7.Kh3 h5 8.gxh5 Kxh5 9.Kh2 Kg4 10.Kg2 h3+ 11.Kg1 Kg5 12.Kh1 Kh5 13.Kg1 Kg4 14.Kh2 Kh4 jm
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