Author: Uri Blass
Date: 23:25:50 07/22/01
Go up one level in this thread
On July 22, 2001 at 22:44:46, Heiner Marxen wrote: >On July 21, 2001 at 15:02:43, Uri Blass wrote: > >>4k3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p7/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1p6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/2p5/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/3p4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/4p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/5p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/6p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/7p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/pp6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p1p5/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p2p4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p3p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p4p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p5p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p6p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1pp5/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1p1p4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1p2p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1p3p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1p4p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/1p5p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/2pp4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/2p1p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/2p2p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/2p3p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/2p4p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/3pp3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/3p1p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/3p2p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/3p3p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/4pp2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/4p1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/4p2p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/5pp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/5p1p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/6pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/ppp5/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/pp1p4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/pp2p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/pp3p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/pp4p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/pp5p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p1pp4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p1p1p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p1p2p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p1p3p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p1p4p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p2pp3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p2p1p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p2p2p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p2p3p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p3pp2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p3p1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p3p2p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p4pp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p4p1p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 >>4k3/p5pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 > >As a reference point here are those of the above set, for which Chest finds >a mate of depth at most 7: > >4k3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 718366; acs 8; bm e4; ce 32756; dm 6; >pv e4 Kf8 Qg4 Ke8 Qg7 Kd8 Bb5 Kc8 Bc6 Kd8 Qd7#; Here chest is faster than chessmaster in finding the shortest mate. chessmaster6000 cannot see mate in 6 even after some minutes because of null move pruning unless I asked it to search for mate in 6. The problematic line from chessmaster's point of view is: 1.e4 Kd7 2.Qg4+ Kc7 3.Qg7+ Kc6 4.d4 Kb6 5.Qd7 when black is in zunzwang. Usually chessmaster is faster than chest in finding the shortest mate but it does not know that the mate that it found is the shortest mate. I guess that the times of chest in every problem is for finding all the solutions and in this case chessmaster has a clear advantage because it is happy with finding 1 solution. >4k3/p7/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 18475646; acs 190; bm Nc3 b3 d4 e3 >e4; >ce 32754; dm 7; pv e3 a6 b3 a5 Bb5+ Kf8 Qf3+ Kg8 Be8 a4 Qf7+ Kh8 Bb2#; >4k3/1p6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 17333339; acs 180; bm Nc3 d4 e4; >ce 32754; dm 7; pv e4 b6 Bb5+ Ke7 f4 Kf7 Qg4 Kf8 Qg6 Ke7 Qf5 Kd6 Qe5#; >4k3/2p5/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 12096969; acs 129; bm d4 e4; ce >32754; dm 7; pv e4 c6 Qh5+ Kf8 Qf5+ Ke8 d4 c5 Bb5+ Ke7 Bg5+ Kd6 Qe5#; >4k3/3p4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 13286071; acs 141; bm d4 e4; ce >32754; dm 7; pv e4 d6 Bb5+ Kf8 d4 d5 Qh5 dxe4 Be3 Kg8 Bc4+ Kf8 Qf7#; >4k3/4p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 14984299; acs 157; bm d4 e4; ce >32754; dm 7; pv e4 e6 Bb5+ Kf8 e5 Kg8 Qg4+ Kh8 a4 Kh7 Ra3 Kh8 Rh3#; >4k3/5p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 11460760; acs 128; bm d4 e4; ce >32754; dm 7; pv e4 f6 Bb5+ Kf8 d4 f5 Qh5 fxe4 Be3 Kg8 Bc4+ Kf8 Qf7#; >4k3/6p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 16160491; acs 182; bm Nc3 d4 e3 e4; >ce 32754; dm 7; pv e3 g6 Bb5+ Kf8 Qf3+ Kg8 b3 g5 Be8 g4 Qf7+ Kh8 Bb2#; >4k3/7p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 16546739; acs 182; bm Nc3 b3 b4 d4 >e3 e4; ce 32754; dm 7; pv e3 h6 Bb5+ Kf8 Qf3+ Ke7 d4 h5 Qf5 h4 h3 Kd6 Qe5#; >4k3/pp6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 22550415; acs 250; bm d4; ce 32754; >dm 7; pv d4 b6 e4 b5 Bxb5+ Kf8 Qf3+ Kg8 Bc4+ Kh8 Qh3+ Kg7 Qh6#; >4k3/p1p5/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 18504672; acs 203; bm d4 e4; ce >32754; dm 7; pv e4 c6 Qh5+ Kf8 e5 c5 Bc4 Ke7 Qf7+ Kd8 Be6 c4 Qd7#; >4k3/p2p4/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 25194763; acs 278; bm d4 e4; ce >32754; dm 7; pv e4 d6 Qh5+ Kf8 Qf5+ Kg8 Bc4+ d5 Bxd5+ Kh8 Qf7 a6 Qg8#; >4k3/p3p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 16366508; acs 178; bm e4; ce >32754; dm 7; pv e4 e6 d4 e5 Bb5+ Kf8 Qf3+ Kg8 Bc4+ Kh8 Qh3+ Kg7 Qh6#; >4k3/p4p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 15718467; acs 186; bm d4 e4; ce >32754; dm 7; pv e4 f6 Qh5+ Kf8 d4 a6 Bc4 Ke7 Qf7+ Kd6 Bf4+ Kc6 Qc7#; >4k3/p5p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 19096368; acs 216; bm d4 e4; ce >32754; dm 7; pv e4 g6 e5 g5 Qf3 a6 Bxa6 g4 Bb5+ Kd8 Qc6 g3 Qd7#; >4k3/p6p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 26466449; acs 291; bm Nc3 b3 d4 e3 >e4; ce 32754; dm 7; pv e3 h6 b3 h5 Ba6 h4 Qf3 h3 Ba3 hxg2 Qf8+ Kd7 Qc8#; >4k3/1p5p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 17392280; acs 197; bm d4 e4; ce >32754; dm 7; pv e4 h6 Bb5+ Kf8 Qf3+ Ke7 e5 Ke6 Qf6+ Kd5 Nc3+ Kc5 Qd6#; >4k3/4p1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 15978617; acs 179; bm e4; ce >32754; dm 7; pv e4 g6 Qf3 g5 Bb5+ Kd8 e5 Kc8 Qc6+ Kb8 Ba6 g4 Qb7#; >4k3/4p2p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 20580683; acs 230; bm d4 e4; ce >32754; dm 7; pv e4 h6 Bb5+ Kf8 Qf3+ Kg8 Bc4+ e6 Bxe6+ Kh8 Qf8+ Kh7 Bf5#; >4k3/5p1p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 18931846; acs 213; bm e4; ce >32754; dm 7; pv e4 h6 Qh5 Kf8 Qxh6+ Ke8 Bb5+ Ke7 e5 Kd8 Qd6+ Kc8 Ba6#; >4k3/6pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 18257028; acs 200; bm e4; ce 32754; >dm 7; pv e4 h6 Bb5+ Kf8 Qf3+ Kg8 Bc4+ Kh8 Qf8+ Kh7 Qe8 h5 Qxh5#; >4k3/pp5p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 31315207; acs 357; bm d4; ce >32754; dm 7; pv d4 h6 Bf4 h5 Qd3 h4 Qh7 h3 Bd6 Kd8 Qe7+ Kc8 Qc7#; >4k3/p5pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - acn 30165023; acs 324; bm e4; ce >32754; dm 7; pv e4 h6 Qh5+ g6 Qe5+ Kd8 Nc3 h5 Nd5 h4 Qe7+ Kc8 Qc7#; > >That took 2 hours 41 minutes on a K7/600 (350 MB hash) so it will not be >competetive, but the results may help others. Chessmaster results in finding the shortest mate in the same problems in comparison to chest: -, 8 4, 190 2, 180 2, 129 13, 141 4, 157 17, 128 6, 182 2, 182 52, 250 25, 203 108,278 125,178 - ,186 24 ,216 6, 291 38, 197 87, 179 5, 230 25, 213 19, 200 103,357 71 ,324 Chessmaster also found mate in 8 in all the other problems that were posted except one [D]4k3/pp2p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 Other problems with 3 pawns when only mate in 9 was found by chessmaster after some minutes: 4k3/1pp1p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/2ppp3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/2pp1p2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/2p1pp2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/2p2pp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/3pp1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/3p1pp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 4k3/4ppp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 Uri
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