Author: Will Singleton
Date: 15:41:48 10/02/05
Go up one level in this thread
On October 02, 2005 at 15:08:01, Kurt Utzinger wrote: >On October 02, 2005 at 14:15:54, Kurt Utzinger wrote: > >>On October 02, 2005 at 13:49:37, Will Singleton wrote: >> >>>White wins easily by promoting and exchanging queens, but most comps can't see >>>it. >>> >>>[d]8/5p1P/8/8/6K1/5P2/1k6/q7 w - - >>> >>>Amateur failed to exchange queens, and drew the game. I'm not quite sure why, >>>seems like a simple search should be enough to handle this. Oddly, if the >>>exchange is forced, the win is seen immediately. This happens with other progs >>>as well. I thought I had taken steps to eliminate root-position dependencies in >>>the search, but maybe something else is happening. >>> >>>Will > > >GUI: Tablebases mit max. 0 Steinen gefunden! [Cache: 4 MB + intern 0.00 MB] >Engine: Spike 1.0a Mainz (32 MB) >von Ralf Schäfer und Volker Böhm > 11.00 0:01 +1.25-- 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd2 6.Kxf7 >Kd3 (663.051) 480 > 11.00 0:01 +3.37-- 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd2 6.Kxf7 >Kd3 (820.230) 497 > 11.00 0:01 +3.67 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd3 6.Kxf7 >Kc2 7.f5 (821.805) 498 > 11.00 0:01 +3.67 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd3 6.Kxf7 >Kc2 7.f5 (821.816) 498 > 12.00 0:01 +3.20-- 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd3 6.Kxf7 >Kc2 7.f5 (825.077) 500 > 12.01 0:02 +3.37-- 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd3 6.Kxf7 >Kc2 7.f5 (1.138.310) 517 > 12.01 0:02 +1.25-- 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd3 6.Kxf7 >Kc2 7.f5 (1.144.085) 520 > 12.05 0:04 +1.37-- 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb1 4.Kf6 Kc2 5.f4 Kd3 6.Kxf7 >Kc2 7.f5 (2.452.332) 513 > 12.05 0:04 +0.07 1.h8L+ Ka2 2.Lxa1 Kxa1 3.Kf5 Kb2 4.Kf6 Kc3 5.Ke5 Kd3 6.f4 >Ke3 7.f5 (2.465.783) 515 > 12.01 0:47 +0.84 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kh5 Dh2+ >6.Kg6 Dg1+ 7.Kh7 Dh2+ 8.Kg8 Db8+ 9.Kg7 Dg3+ 10.Kh6 Dh2+ 11.Kg5 Dg3+ 12.Kh5 De5+ >13.Kh6 Dh2+ (20.800.058) 433 > 12.01 0:47 +0.84 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kh5 Dh2+ >6.Kg6 Dg1+ 7.Kh7 Dh2+ 8.Kg8 Db8+ 9.Kg7 Dg3+ 10.Kh6 Dh2+ 11.Kg5 Dg3+ 12.Kh5 De5+ >13.Kh6 Dh2+ (20.806.480) 433 > 13.00 0:57 +0.75 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kh5 Dh2+ >6.Kg6 Dg1+ 7.Kh7 Dh2+ 8.Kg8 Db8+ 9.Kg7 Dg3+ 10.Kh8 Dh2+ 11.Dh7 Db8+ 12.Dg8 Dh2+ >13.Dh7 (24.914.609) 432 > 13.00 0:57 +0.75 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kh5 Dh2+ >6.Kg6 Dg1+ 7.Kh7 Dh2+ 8.Kg8 Db8+ 9.Kg7 Dg3+ 10.Kh8 Dh2+ 11.Dh7 Db8+ 12.Dg8 Dh2+ >13.Dh7 (24.940.699) 432 > 14.00 1:21 +0.66 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kf4 Dd4+ >6.Kg5 Dg1+ 7.Kf5 Dc5+ 8.Kg6 Dg1+ 9.Kh6 Dh2+ 10.Dh5 Df4+ 11.Kg7 Dc7+ 12.Kg6 Dd6+ >13.Kh7 Dd4 14.Da5+ (35.084.230) 430 > 14.00 1:21 +0.66 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kf4 Dd4+ >6.Kg5 Dg1+ 7.Kf5 Dc5+ 8.Kg6 Dg1+ 9.Kh6 Dh2+ 10.Dh5 Df4+ 11.Kg7 Dc7+ 12.Kg6 Dd6+ >13.Kh7 Dd4 14.Da5+ (35.133.524) 430 > 15.00 2:08 +0.62 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kf4 Dd4+ >6.Kg5 Dg1+ 7.Kf5 Dc5+ 8.Kg6 Dg1+ 9.Kh6 Dh2+ 10.Dh5 Df4+ 11.Kg7 Dd4+ 12.Kg6 Dd6+ >13.Kg5 Dg3+ 14.Kf6 (55.214.083) 430 > 15.00 2:08 +0.62 1.h8D+ Ka2 2.Da8+ Kb2 3.Db7+ Kc3 4.Dxf7 Dg1+ 5.Kf4 Dd4+ >6.Kg5 Dg1+ 7.Kf5 Dc5+ 8.Kg6 Dg1+ 9.Kh6 Dh2+ 10.Dh5 Df4+ 11.Kg7 Dd4+ 12.Kg6 Dd6+ >13.Kg5 Dg3+ 14.Kf6 (55.306.030) 431 > 16.00 4:04 +0.92++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 (105.393.162) 431 > 16.00 4:04 +0.92++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 (105.393.162) 431 > 16.00 4:29 +3.67++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 (118.672.697) 439 > 16.00 4:29 +3.67++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 (118.672.697) 439 > 16.00 4:31 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 (119.643.956) 440 > 16.00 4:32 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 (120.077.433) 441 > 17.00 4:35 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg6 (121.954.387) 442 > 17.05 4:36 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg6 (122.624.911) 442 > 18.00 4:44 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg6 (126.835.352) 445 > 18.05 4:47 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg6 (128.425.244) 446 > 19.00 5:05 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg6 Kd7 12.f7 (138.408.490) 452 > 19.07 5:12 +4.12 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg6 Kd7 12.f7 (141.949.848) 454 > 20.07 5:12 +4.87++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.Kg6 (142.072.043) 454 > 20.07 5:12 +4.87++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.Kg6 (142.072.043) 454 > 20.07 5:12 +6.91++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.f7 (142.343.223) 455 > 20.07 5:12 +6.91++ 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.f7 (142.343.223) 455 > 20.00 5:55 +12.00 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.f7 Kd6 13.f8D+ Kd5 >(167.478.975) 471 > 20.08 6:01 +12.00 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.f7 Kd6 13.f8D+ Kd5 >(171.843.273) 475 > 21.00 7:30 +12.00 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.f7 Kd6 13.f8D+ Kd5 >14.Kf6 (222.929.192) 494 > 21.08 7:42 +12.00 1.h8D+ Ka2 2.Dxa1+ Kxa1 3.Kf5 Kb2 4.f4 Kc3 5.Ke5 Kd2 6.f5 >Kd3 7.f6 Ke3 8.Kd6 Ke4 9.Ke7 Ke5 10.Kxf7 Kd6 11.Kg7 Kd7 12.f7 Kd6 13.f8D+ Kd5 >14.Kf6 (231.221.073) 500 Of course, I should have specified no tablebases. I'd say 4 minutes would qualify as a problem for Spike. :) The solution isn't the first move, it's the exchange leading to the win. Will
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