Author: Severi Salminen
Date: 11:17:47 01/08/01
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>i see you have 'futile moves' also. If you throw futility pruning out, >then nullmove should work brilliant positionally spoken. I tried, but the behaviour was the same. But then I removed my very stupid 3-fold repetition algorithm (it is only adding different bitboards of a position to get a "key") and I got results with no fail highs or lows. I must find another way to find repetitions... >Otherwise you reduce depth and let opponent to move then you prune >without trying the reduced depth even! >Usually that's tactically not missing too much if you implement a few >exceptions like allowing all captures, but it prunes positionally a lot! What do you mean by allowing all captures? You mean excluding captures from futility pruning - sounds odd? >Nullmove definitely should give also in endgame about same PV and same >score. Nullmove never can cause big problems, it can at most show >existing problems. Yes, advantages are _much_ greater than disadvantages, as you probably already have noticed :) Severi
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