Author: Alvaro Jose Povoa Cardoso
Date: 14:56:58 08/30/01
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On August 30, 2001 at 17:30:22, Robert Hyatt wrote: >On August 30, 2001 at 16:41:27, Alvaro Jose Povoa Cardoso wrote: > >>Should we extend a PV move? If so, by how much? 1/4th of a ply, 1/3rd of a ply? >>From my experiments it only helps in some positions and only detects mate >>sooner, but "allways" with a tree size increase. >>As a side question, how do I identify a PV move? >>Using PVS I assume a PV move is when alpha <> beta-1. >>Am I right? >> >>Thank you in advance, >>Alvaro Cardoso > > >Probably better is to save the original alpha/beta values at the root, >and compare to those. If current alpha = root alpha, and current beta = >root beta, you are definitely on a PV move search. That's what you do in Crafty in the 'Internal Iterative Deepening' part, isn't it? And about the extension of a PV move, have you ever tested it? What is you opinion on this? Regards, Alvaro Cardoso
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