Author: Daniel Clausen
Date: 11:31:59 02/27/00
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Hi On February 27, 2000 at 14:03:11, Richard A. Fowell (fowell@netcom.com) wrote: >On February 27, 2000 at 11:19:04, Daniel Clausen wrote: >>>Which chess programs (other than Screamer) get these right? >> >>Not that anyone cares, but my engine gets these right. :) > >Actually, I care - for two reasons. First, it is nice to think that I'm >not the only one to think it is worth doing this right. Second, it might >help other programmers address this if those who do handle this could >present a simple way of doing so. > >So - what do you use? Robert Hyatt says he includes castling rights/en passant >in his hash. Is that what you do? Yes, I include these too in the hash value. (side to move also) The problem if you don't include these in the hash as well is not only that repetition-check is not 100% correct but also that the usage of the hashtable itself is (a lil) broken. I'm aware that this is not "a big deal" but I try to fix at least the known bugs in my engine. :-) Kind regards, -sargon
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