Author: Gian-Carlo Pascutto
Date: 14:14:42 08/07/01
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On August 07, 2001 at 16:42:27, Alvaro Jose Povoa Cardoso wrote: >I'm confused with ETC. Taking Crafty as the example, should we use HashProbe() >with ETC or should we make a special version of HashProbe() that does not >changes alpha and beta since all we want is the hash score? Changing alpha/beta shouldn't matter since your normal code should change it in exactly the same way. >Correct me if I'm wrong: >When using ETC, after making each move we should probe the hash table for the >opposite side right? Yes >Cutoffs should be done if the hash score >= BETA right? Or <= alpha >When probing the hash table for ETCs should we consider >Upperbounds/Lowerbounds/Exactscores or >sould we simply use the hash score? Depends. Exact always allows cutoff, upper/lower depends on whether you are >= beta or <= alpha. As I said, it's _exactly_ the same as in normal search. -- GCP
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