Author: Tord Romstad
Date: 13:12:55 10/26/05
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On October 26, 2005 at 15:41:56, Joachim Rang wrote: >>I use them absolutely everywhere, except at the root and when the >>remaining depth is less than 2 plies. I use late move reductions even >>at PV nodes. In principle, I want to be more restrictive, but to my >>frustration this always makes my program weaker. :-( >> > >Do you even reduce captures, promotions and checks? No, I never reduce capture, promotions, checks or moves which are extended. >Is your only exception the Botvinik-Markoff-condition? I used Botvinnik-Markoff extensions in Gothmog, but I don't use the Botvinnik-Markoff condition for anything at all in Glaurung. You are probably referring to the condition I mentioned in my first post in this thread, but this condition is completely unrelated to the BM condition (the only similarity is that they both involve refutations of the null move). The BM condition is that the null move is refuted by the same move twice in a row. My condition for avoiding reductions is that the null move is refuted by a move with the moving piece equal to the moving piece of the reduced move. Tord
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