Author: Peter McKenzie
Date: 00:14:30 04/22/02
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On April 21, 2002 at 19:29:39, Will Singleton wrote: >All, > >[D]5nk1/2R3p1/r4p2/4P3/p2R2N1/7P/1r4P1/7K b - - 0 42 > >The question is, my prog wants to play a3, and doesn't see the forced repetition >until ply 9. I've just thrown away my old buggy rep code, and replaced it with >a dedicated hash table. The new stuff seems to be debugged and working (maybe), I've always thought a hash table for this is overkill. Iterating over a list of hash keys seems simpler and is probably just as fast. >but there must be a trick to getting this position earlier. An extension, >perhaps? My program likes a3 at depth 3, then locks on to fxe5 which it held thru. depth 12 at least. This wasn't conclusive that it saw a3 lead to a draw, so I played a3 and searched from there. Then I get a draw at depth 5. I'm not aware of any tricks I'm doing that would help here. Perhaps you still have a bug lurking? Oh, I give a draw score when a position has occurred twice. Perhaps you are counting to 3? Peter > >Will
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