Author: Martin Giepmans
Date: 08:25:30 05/06/04
Go up one level in this thread
On May 06, 2004 at 09:34:23, Uri Blass wrote: >On May 06, 2004 at 07:44:13, Martin Giepmans wrote: > >>On May 05, 2004 at 21:08:48, Will Singleton wrote: >> >>>[D]8/8/3Rr3/6Bk/7P/5K1P/8/8 w - - 0 74 >>> >>>This is from ICC today. The game is already won, but Bf4 wins quicker. Amateur >>>plays it immediately, anybody else? (not Shredder, Ruffian, CM) >>> >>>13 1007 149 920346 Bf4 Rxd6 Bxd6 Kxh4 Kg2 Kh5 Be7 Kg6 Kg3 Kh5 >>>14 1007 243 1496827 Bf4 Rxd6 Bxd6 Kxh4 Kg2 Kh5 Be7 Kg6 Kg3 Kh5 >>>15 1048 501 3162742 Bf4 Rxd6 Bxd6 Kxh4 Kg2 Kh5 Kg3 Kg5 Be5 Kf5 >> >> >>SpiderChess (without tablebases) also plays it (instantly). >>I guess that some engines overlook it because of nullmove. >> >>Martin > >I do not see null move problem. >It is evaluation problem and movei does not know to trade pieces when it has the >advantage. > >It probably can solve it if I add a bonus in the case that the opponent has only >a king but this also means that the wrong evaluation of KBP vs K will remain. > >Uri Perhaps you are right. I indeed have code that encourages the engine to exchange in some cases. KBP vs K with bishop of the wrong color (I guess that's what you mean) is treated as a special case. Martin
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