Author: Uri Blass
Date: 04:48:30 03/02/06
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On March 02, 2006 at 05:41:18, Tord Romstad wrote: <snipped> > The biggest >recent leap in playing strength for my program recently (except for >parallel search, of course) came when I finally decided to drop the use >of history counters altogether, and use evaluation data and null move >threat detection instead. This also makes sense from an intuitive point >of view, IMHO. When deciding whether a move should be reduced, the >impact of the move on the current position should be much more relevant >than how the same move has performed in the often totally different >positions we have visited earlier in the search. The problem is that you have not perfect evaluation so evaluation data may be wrong so intuitively combination of both is probably best. If the move never failed high then it probably also never failed high in similiar conditions(of course counters for different conditions may be used). Uri
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