Author: Uri Blass
Date: 00:15:59 11/05/03
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On November 05, 2003 at 03:12:08, Uri Blass wrote: >On November 04, 2003 at 13:40:42, Dieter Buerssner wrote: > >>On November 04, 2003 at 02:49:22, Daniel Shawul wrote: >> >>> In my chess program i keep track of two killer moves and a history table. >>> I am a bit confused when to update them. >>> It seems to be better when I update them only with beta fail moves. >>> Is that the right way? I know most chess programs do it each time >>>a best move is found(like they do their hashtables). >> >>Perhaps, you misinterpreted something here. I would not believe, that most chess >>programs update the killer move, when a best move is found. At least not in >>general, when the best move is a fail low move (and this will happen very >>often). > >perhaps I do not understand something but my chess program has no best move in >case of fail low because it does not claulcate exact score for moves that fail >low. > > Many chess programs won't store a move in hashtables, when the best move >>failed low (UPPER_BOUND), either. > >I am not going to store a move when I have no idea about the best move. > >Uri To be more correct I am not going to store a move when I have no idea about a move that gives a value that is bigger than beta because if the first move fail high I also do not know the best move and in theory it is possible that the first move is the worst move but still good enough to be above beta. Uri
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