Author: Joachim Rang
Date: 01:45:09 10/27/05
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On October 26, 2005 at 16:12:55, Tord Romstad wrote: >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 Thanks for clarifying this. At first it appeared to me that both conditions are similiar but now I see the difference. Did you ever try to discriminate between good and bad captures? Not reducing bad captures seems questionable to me since they should be "bad". Joachim
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