Author: Heiner Marxen
Date: 08:36:04 02/09/01
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On February 09, 2001 at 06:51:15, leonid wrote: >On February 09, 2001 at 06:47:28, leonid wrote: > >>Hi! >> >>If you like to solve a forced mate, you can try this position: >> >>[D]1bqQBnRn/3N2Qb/Q1QN2np/1Q1Q1qpk/4Qqbn/2B1Qrnn/2Q5/K1R5 w - - >> >>Please, indicate your result. Chest find a mate in 7 with 1.Qxg5+: Qxg5+ Nxg5 Qdxf5 Nhxf5 Qh2+ Bh3 Nf6+ Kh4 Qxh6+ Nxh6 Q4xf4+ Ng4 Qfxg5# (3.3 hours, K7/600 350MB hash) >>By curiosity I looked what is the NPS (nodes/second) for this position. Since >>the number of moves, during the solution of mate went quit often up to 130 for >>whites, NPS was more that impressive. If it could be the same all the time! On >>It went up in around 60% as average. It is the same for your program? NPS depend >>greatly on number of average moves existing in each ply? >> >>Thanks, >>Leonid. For Chest on your crowded boards NPS greatly decreases, by a factor around 2 or 3. Some of the heuristics to gain speed, do not pay off, anymore. Hmmm, may be I should improve my heuristics ;-) The reduced NPS does not worry me, as long as the job is done quickly. Heiner
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