Author: John Boyd
Date: 17:21:30 05/13/03
Go up one level in this thread
On May 13, 2003 at 07:31:32, Uri Blass wrote: >On May 13, 2003 at 07:13:55, John Boyd wrote: > >>On May 13, 2003 at 00:56:49, Jouni Uski wrote: >> >>[D]5bk1/p3p1p1/p3P1P1/p7/p7/8/P7/5K2 w - - >>> >>>This is one of my oldest test positions with mate in 17 (Ke2). It's still >>>unsolved by top pros, but Yace and Crafty can solve it. Interestingly >>>Shredder7.04 first says mate in 22 and then mate in 0 (#0) !?!? >>> >>>Jouni >> >>My engine (TRACE 1.1.2) running on a P3-600 finds Ke2 Mate16 in less than a >>second... at least its good for one thing... :-) > >I forgot to say that not exactly. > >It is mate in 17 so your engine is not so good if it can see mate in 16 that >does not exist. > >Uri You are right Uri. My 1.1.3 Alpha version finds Ke2 in 0.3 secs and agrees with you that its Mate in 17 after 3 seconds. I fixed the popular bug of storing mate scores in the hashtable relative to the remaining search depth. It should be relative to the position. Ross
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