Author: John Boyd
Date: 22:47:24 05/13/03
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On May 13, 2003 at 23:45:15, Russell Reagan wrote: >On May 13, 2003 at 21:30:01, John Boyd wrote: > >>Hi all, >> >>Usually, a mate score is greater than beta and thus is stored as a LOW BOUND in >>the hash table. >> >>But why? Assuming its the true score, shouldn't it be stored as an EXACT score? >> >>I guess the problem is in assuming it is indeed the shortest mate. Is that why? >> >>Thanks, >> >>Ross > >http://www.brucemo.com/compchess/programming/matehash.htm > >This article by Bruce Moreland discusses the issue you are talking about, I >think. He says it's more headache than it's worth to store the mate score as an >exact score because of the translation that you have to do. Thanks Russell, I hadn't read this particular page on Bruce's site. The mate score conversion is already implemented in my engine, so that's not a problem. The problem was with the bounds type. I think its starting to make sense now... (which is a worry... :-) Ross
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