Author: Will Singleton
Date: 15:32:19 02/06/03
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On February 06, 2003 at 17:35:56, Dieter Buerssner wrote: >On February 06, 2003 at 16:57:29, Jon Dart wrote: > >>Here's a position that occurred in a recent offline test game: >> >>8/6r1/p7/1p6/3kBn1P/P2p1P2/1P6/3R1K2 b - - >> >>Ke3 is winning here, but Arasan 6.3 doesn't get this, in fact it wants to play >>Rg8. It is apparently a null move issue. If I turn off null moves, or restrict >>the null move in the case where the opponent has an advanced passer, then it is >>solved quickly. > >I also get a rather big difference in search depth, but not so much in time. >With null move after 8 s/d12, without 2 s/d8. (Yace, P4, 2.53 GHz). Each time a >significant fail high for Ke3. > >Regards, >Dieter With null, ply 12, 32 sec; without, ply 8, 3 sec. Interesting to look at Ruffian, which goes to ply 15, 24 sec to find it (p4 2.8ghz). Maybe he really does use null aggressively. Will
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