Author: Uri Blass
Date: 07:00:09 05/16/04
Go up one level in this thread
On May 16, 2004 at 09:07:25, Mike Byrne wrote: >On May 16, 2004 at 05:49:06, Jorge Pichard wrote: > >>[D]8/6k1/p7/1p6/PP6/8/K1P5/8 w - - 0 59 >> > > >I wonder why it didn't see the mate in 18 after axb5. It is typical for programs with part of the tablebases to see longer mate. KPPP vs K has no practical value so probably 99% of the people do not use them Here is Crafty with part of the tablebases on P850. It can also see a longer mate and plans axb5 a5 and not axb5 axb5 and it takes it time to see that axb5 is best with a shorter mate. New game, 8/6k1/p7/1p6/PP6/8/K1P5/8 w - - 0 1 Analysis by Crafty 19.12: 1.Kb3 +- (1.83) Depth: 1/3 00:00:00 1.Kb3 Kf6 2.axb5 axb5 +- (1.68) Depth: 2/3 00:00:00 1.axb5 axb5 2.Kb3 +- (1.88) Depth: 2/3 00:00:00 1.axb5 axb5 2.Kb3 +- (2.28) Depth: 3/6 00:00:00 1.axb5 axb5 2.Kb3 +- (3.28) Depth: 3/6 00:00:00 1.axb5 axb5 2.Kb3 +- (5.28) Depth: 3/6 00:00:00 1.axb5 a5 2.bxa5 +- (11.64) Depth: 3/6 00:00:00 1.axb5 a5 2.bxa5 Kf6 +- (11.44) Depth: 4/6 00:00:00 1.axb5 a5 2.bxa5 Kf6 +- (11.84) Depth: 5/7 00:00:00 1.axb5 Kf6 2.c4 a5 3.bxa5 +- (11.86) Depth: 5/7 00:00:00 1.axb5 a5 2.bxa5 Kf6 3.b6 Ke5 +- (12.03) Depth: 6/8 00:00:00 2kN, tb=17 1.axb5 a5 2.bxa5 Kf6 3.b6 Ke5 +- (12.43) Depth: 7/9 00:00:00 3kN, tb=25 1.axb5 a5 2.bxa5 Kf6 3.b6 Ke5 +- (13.43) Depth: 7/9 00:00:00 4kN, tb=29 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd5 4.Kb3 Kd4 5.a8Q +- (13.63) Depth: 7/9 00:00:00 5kN, tb=30 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd5 4.Kb3 Ke4 5.a8Q+ Kd4 +- (13.63) Depth: 8/11 00:00:00 7kN, tb=30 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd6 4.c4 Kc7 5.a8Q Kd6 +- (13.92) Depth: 9/15 00:00:00 10kN, tb=78 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd5 4.Kb3 Kd4 5.c3+ Ke5 6.c4 Kd4 7.a8Q +- (14.09) Depth: 10/15 00:00:00 25kN, tb=86 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd5 4.Kb3 Kd4 5.c3+ Ke5 6.c4 Kd4 7.a8Q +- (14.49) Depth: 11/22 00:00:00 39kN, tb=270 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd6 4.c4 Kd7 5.b5 Kc7 6.a8Q +- (14.53) Depth: 11/22 00:00:00 103kN, tb=292 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd6 4.c4 Kd7 5.a8Q Kc7 +- (14.61) Depth: 12/23 00:00:00 144kN, tb=344 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd6 4.c4 Kd7 5.a8Q Kc7 +- (15.01) Depth: 13/24 00:00:01 160kN, tb=539 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd6 4.c4 Kd7 5.a8Q Kc7 +- (16.01) Depth: 13/24 00:00:01 198kN, tb=562 1.axb5 Kf6 2.bxa6 Ke5 3.a7 Kd6 4.c4 Kd7 5.a8Q Kc7 +- (18.01) Depth: 13/24 00:00:01 204kN, tb=566 1.axb5 a5 2.bxa5 Kf6 3.b6 Ke5 4.b7 Kd6 5.b8Q+ Kc5 6.Qd6+ Kc4 7.Qb4+ Kd5 8.c4+ Kd4 9.c5+ Kd3 10.a6 +- (20.31) Depth: 13/24 00:00:03 1225kN, tb=914 1.axb5 a5 2.bxa5 Kf6 3.b6 Ke5 4.b7 Kd6 5.b8Q+ Kc5 6.Qd6+ Kc4 7.Qb4+ Kd5 8.c4+ Kd4 9.c5+ Kd3 10.a6 +- (20.71) Depth: 14/30 00:00:04 1629kN, tb=1093 1.axb5 a5 2.b6 Kf6 3.b7 Ke5 4.b8Q+ Ke4 5.Qe8+ Kf3 6.Qe4+ Kg3 7.Qf4+ Kg2 8.Qf3+ Kh2 9.bxa5 Kg1 10.a6 Kh2 +- (20.72) Depth: 14/30 00:00:05 2475kN, tb=1304 1.axb5 a5 2.b6 Kf6 3.b7 Ke5 4.b8Q+ Ke4 5.Qe8+ Kf3 6.Qe4+ Kg3 7.Qf4+ Kg2 8.Qf3+ Kh2 9.bxa5 Kg1 10.a6 Kh2 +- (21.12) Depth: 15/32 00:00:06 2908kN, tb=1937 1.axb5 a5 2.b6 Kf6 3.b7 Ke5 4.b8Q+ Ke4 5.Qe8+ Kf3 6.Qe4+ Kg3 7.Qf4+ Kg2 8.Qf3+ Kh2 9.bxa5 Kg1 10.a6 Kh2 +- (22.12) Depth: 15/32 00:00:07 3102kN, tb=2030 1.axb5 a5 2.b6 Kf6 3.b7 Ke5 4.b8Q+ Ke4 5.Qe8+ Kf3 6.Qe4+ Kg3 7.Qf4+ Kg2 8.Qf3+ Kh2 9.bxa5 Kg1 10.a6 Kh2 +- (24.12) Depth: 15/32 00:00:07 3111kN, tb=2030 1.axb5 a5 2.b6 a4 3.b7 Kf6 4.b8Q Ke6 5.Qe5+ Kd7 6.Qd6+ Kc8 7.Qc7+ Kxc7 +- (#24) Depth: 15/32 00:00:17 9069kN, tb=4364 1.axb5 a5 2.b6 a4 3.b7 Kf6 4.b8Q Ke6 5.Qe5+ Kd7 6.b5 Kc8 7.Qc7+ Kxc7 +- (#23) Depth: 16/34 00:00:21 11048kN, tb=5143 1.axb5 a5 2.bxa5 Kf6 3.a6 Ke5 4.a7 Ke4 5.a8Q+ Ke3 6.Qe4+ Kf2 7.Qf3+ Ke1 8.Qe2+ Kxe2 +- (#19) Depth: 17/37 00:00:41 21520kN, tb=11667 1.axb5 axb5 +- (#18) Depth: 18/39 00:02:02 73157kN, tb=20288 1.axb5 axb5 +- (#18) Depth: 19/49 00:02:22 82764kN, tb=24931 Uri
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