Author: Stan Arts
Date: 00:55:38 10/17/03
Go up one level in this thread
Neurosis 1.4(next version) finds it in 7 seconds on my slow pIII-550 . (Does use null-move pruning) Legal moves: 29 Ply Score Time Nodes Best move and expected line ------------------------------------------------------------ 2 174 5 180 gxh4 Kxh4 3 258 5 215 gxh4 < + > d6 hxg5 3 338 5 403 gxh4 Kxh4 Bxg4 4 338 11 2579 gxh4 Kxh4 Bxg4 Kxg4 4 340 11 3500 Ne3 < + > d6 gxh4 Kxh4 4 340 11 3762 Ne3 d6 gxh4 Kxh4 5 341 22 11003 Ne3 d6 gxh4 Kxh4 Bxg4 5 343 22 11120 gxh4 < + > Kxh4 Bxg4 h5 5 345 22 12421 gxh4 Kxh4 Bxg4 Bxf4 Nf2 5 378 22 13315 fxg5 < + > hxg5 gxh4 d6 5 450 27 14716 fxg5 hxg5 gxh4 Kxh4 Bxg4 6 463 82 67727 fxg5 hxg5 Ne3 Kh6 Nxg4+ Rxg4 Bxg4 6 655 82 68268 Ne3 < + > d6 fxg5 hxg5 6 655 93 76099 Ne3 d6 fxg5 hxg5 gxh4 Kxh4 7 655 555 513035 Ne3 d6 fxg5 hxg5 gxh4 Kxh4 Nxg4 7 9993 692 644034 Nc3 (Mate in 4) < + > d6 Bd1 e3 7 9993 752 699799 Nc3 (Mate in 4) d6 Bd1 e3 Ne2 Rxg3 Nxg3+ Total nodes:1693637 n/sec:96945 (Q-nodes:8392 max depth:15) >[D] 8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Nc3;id #1097 mate in 4 >very-very tough; > >This is a composed mate in 4 problem from Benko's Baffler's #1097. > >Most engines take a very long time to find the mate in 4. >
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