Author: Vincent Diepeveen
Date: 13:50:53 04/15/03
Go up one level in this thread
On April 15, 2003 at 16:10:29, Mike S. wrote: >Test position by Hermann Seitz, 1986 >[D]Bk6/1P2p1pp/RP1p3p/P7/2P5/4p3/4p1p1/4Kbrb w - - 0 1 >1.Ra7 etc.; the idea ist to play Ra6-a7-a6 etc. until black is forced to play >d6-d5 and white mates after cxd5. >Here, most engines reach big depths quickly, but only a few (i.e. King 3.23 or >Shredder 7) find also the mate quickly. Many engines go for a draw only, at diep with nullmove=off finds it instantly but plays Ra7 anyway: 00:00 45460 45k 0 0 11365 (2) 31 (1,490) 0.000 Ra6-a7 g7-g6 c4-c5 d6xc5 a5-a6 g6-g5 00:00 46523 47k 0 0 12096 (2) 32 (1,529) 0.000 Ra6-a7 g7-g6 c4-c5 d6xc5 a5-a6 g6-g5 00:00 45860 46k 0 0 12841 (2) 33 (1,569) 0.000 Ra6-a7 g7-g6 c4-c5 d6xc5 a5-a6 g6-g5 00:00 43867 44k 0 0 13599 (2) 34 (1,570) 0.000 Ra6-a7 g7-g6 c4-c5 d6xc5 a5-a6 g6-g5 00:00 43496 43k 0 0 14354 (2) 35 (1,571) 0.000 Ra6-a7 g7-g6 c4-c5 d6xc5 a5-a6 g6-g5 00:00 75645 76k 0 0 46900 (2) 36 (6,677) MATE19 Ra6-a7 g7-g6 Ra7-a6 g6-g5 Ra6- a7 g5-g4 Ra7-a6 g4-g3 Ra6-a7 e7-e6 Ra7-a6 e6-e5 Ra6-a7 e5-e4 Ra7-a6 h6-h5 Ra6-a7 h7-h6 Ra7-a6 h5-h4 Ra6-a7 h6-h5 Ra7-a6 h4-h3 Ra6-a7 h5-h4 Ra7-a6 h3-h2 Ra6-a7 h 4-h3 a5-a6 d6-d5 c4-c5 d5-d4 c5-c6 d4-d3 c6-c7 00:00 81434 81k 0 0 56190 (2) 37 (6,769) MATE19 Ra6-a7 g7-g6 Ra7-a6 g6-g5 Ra6- a7 g5-g4 Ra7-a6 g4-g3 Ra6-a7 e7-e6 Ra7-a6 e6-e5 Ra6-a7 e5-e4 Ra7-a6 h6-h5 Ra6-a7 h7-h6 Ra7-a6 h5-h4 Ra6-a7 h6-h5 Ra7-a6 h4-h3 Ra6-a7 h5-h4 Ra7-a6 h3-h2 Ra6-a7 h 4-h3 a5-a6 d6-d5 c4-c5 d5-d4 c5-c6 d4-d3 c6-c7 >least in the pv of the initial position (typical is 1.Ra7/2.a6??/3.c5?? forcing >a stalemate). > >Regards, >M.Scheidl
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