Author: Steven J. Brann
Date: 17:43:29 10/22/03
Go up one level in this thread
On October 22, 2003 at 19:19:42, leonid wrote: >On October 22, 2003 at 15:23:18, Darren Rushton wrote: > >>[D] 1nk5/p2p1K2/b1p2B1N/1p6/1PP5/8/2P3pQ/8 w - - 0 1 >> >>sorry for the error! > >Your position make me feel very shameful about my program. Before I was certain >that it contain no mistake in basic logic that look for mate. It was not so this >time. It found nothing in 6 and 7 moves, in brute force search. Only looking >into Your second message I found what was the problem. Initial position was >wrong. It was big relief for me! > >Position as indicated was a mate in 6. LLches was able to solve it only by brute >force. > >Leonid. Chessmaster 9000 on a P4 3.0G machine with default personality SS=12 and 128MB hash solves it quickly. Time Depth Score Positions Moves 0:00 1/3 9.84 382 1.cxb5 Bxb5 2.Qxg2 Bc4+ 3.Ke7 0:00 1/4 9.80 1506 1.cxb5 Bxb5 2.Qxg2 Bc4+ 3.Ke7 Na6 0:00 1/4 9.92 1758 1.Qxg2 bxc4 2.Nf5 Kb7 3.Qg3 0:00 1/4 10.44 7593 1.Nf5 d5 2.cxd5 cxd5 3.Ne7+ Kb7 4.Qxg2 0:00 1/5 11.01 36506 1.Nf5 Kb7 2.c5 Ka8 3.Qxg2 Bb7 4.Qg3 0:00 1/6 10.93 56789 1.Nf5 Kb7 2.c5 Ka8 3.Qxg2 Bc8 4.Nd6 0:00 1/7 Mate08 311718 1.Nf5 g1=Q 2.Qh8+ Kb7 3.Be5 d6 4.Nxd6+ Ka8 5.Nb7 Qf2+ 6.Ke6 Qf5+ 7.Kxf5 Bxb7 8.Qxb8# 0:00 1/8 Mate08 332292 1.Nf5 g1=Q 2.Qh8+ Kb7 3.Be5 d6 4.Nxd6+ Ka8 5.Nb7 Qf2+ 6.Ke6 Qf5+ 7.Kxf5 Bxb7 8.Qxb8# 0:01 2/9 Mate08 513429 1.Nf5 g1=Q 2.Qh8+ Kb7 3.Be5 d6 4.Nxd6+ Ka8 5.Nb7 Qf2+ 6.Ke6 Qf5+ 7.Kxf5 Bxb7 8.Qxb8# 0:02 3/10 Mate08 1264563 1.Nf5 g1=Q 2.Qh8+ Kb7 3.Be5 d6 4.Nxd6+ Ka8 5.Nb7 Qf2+ 6.Ke6 Qf5+ 7.Kxf5 Bxb7 8.Qxb8# 0:05 4/11 Mate08 2924355 1.Nf5 g1=Q 2.Qh8+ Kb7 3.Be5 d6 4.Nxd6+ Ka8 5.Nb7 Qf2+ 6.Ke6 Qf5+ 7.Kxf5 Bxb7 8.Qxb8# 0:15 5/12 Mate08 8275087 1.Nf5 g1=Q 2.Qh8+ Kb7 3.Be5 d6 4.Nxd6+ Ka8 5.Nb7 Qf2+ 6.Ke6 Qf5+ 7.Kxf5 Bxb7 8.Qxb8# 0:24 5/12 Mate06 13981583 1.Qd6 g1=Q 2.Be5 Qf2+ 3.Kg7 Qg1+ 4.Kh7 Qb6 5.c5 Qd8 6.Qxb8# 0:27 6/13 Mate06 15774918 1.Qd6 g1=Q 2.Be5 Qf2+ 3.Kg7 Qg1+ 4.Kh7 Qb6 5.c5 Qd8 6.Qxb8# 0:44 7/14 Mate06 27043922 1.Qd6 g1=Q 2.Be5 Qf2+ 3.Kg7 Qg1+ 4.Kh7 Qb6 5.c5 Qd8 6.Qxb8# 1:18 8/15 Mate06 49749368 1.Qd6 g1=Q 2.Be5 Qf2+ 3.Kg7 Qg1+ 4.Kh7 Qb6 5.c5 Qd8 6.Qxb8# 2:10 9/16 Mate06 81537159 1.Qd6 g1=Q 2.Be5 Qf2+ 3.Kg7 Qg1+ 4.Kh7 Qb6 5.c5 Qd8 6.Qxb8# Steve
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