Author: Robert Hyatt
Date: 09:43:14 05/13/05
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On May 13, 2005 at 09:10:09, Alvaro Jose Povoa Cardoso wrote: >On May 13, 2005 at 08:13:41, Robert Hyatt wrote: > >>On May 13, 2005 at 05:15:07, Alvaro Jose Povoa Cardoso wrote: >> >>>Hi, >>>I saw that you removed the code that adjusts the bounds in Hashprobe(). >>>Could you please elaborate on that? Was it wrong or unsafe before? >>>You had it for a long time, it sure must be sound. >>> >>>Best regards, >>>Alvaro Cardoso >> >> >>Just wasn't worth doing. With PVS, 99.999% of all positions searched are >>searched with a null-window. Adjusting alpha or beta doesn't do anything there >>to speak of... > >So, you only change alpha in case of an exact score, right? > >Alvaro In a way of thinking, yes. But in Crafty alpha is the actual score so far anyway at any particular ply, so yes, I do change that on an EXACT match, otherwise, I don't change anything.
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