Author: Tord Romstad
Date: 08:39:17 08/12/04
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On August 12, 2004 at 11:18:35, Uri Blass wrote: >On August 12, 2004 at 10:52:36, martin fierz wrote: > >>On August 12, 2004 at 09:28:24, Tord Romstad wrote: >> >>hi tord, >> >>thanks for the clarification! so you really RETURN when your >>almost_certainly_fail_high function returns true? isn't this a bit dangerous? i >>mean, probably it helps, but i can imagine that there are positions where >>gothmog will never find the right move because your almost_certainly_fail_high >>function returns 1 in a position where it shouldn't. > >I guess it is dependent on the depth. > >I probably use the same idea with different words. The words are rather different in my engine, too. As mentioned before, I don't really have any function named almost_certainly_fail_high or anything similar. >If (evalfull[ply]>beta+margin(depth,...)) > return beta; Ed does something very similar, IIRC. Personally I never managed to make it work well when depth>3*PLY, except with so ridiculously big margins that the reduction in node count was hardly noticable. Tord
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