Author: Bruce Moreland
Date: 13:45:14 01/06/01
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On January 06, 2001 at 14:34:20, Steve Maughan wrote: >Leen, > >>After posting my question, I realized that it is >>irrelevant if all position values where, say, white >>is on move, are increased by the same amount. >>For example, choosing between 0 and 50 leads to >>the same choice as moving between 10 and 60, that is, >>after increasing the original values by 10. > >I'm not sure I agree! You are assuming that the search is always / usually >halted with the same colour to move - this is not the case if there are any form >of extensions. In addition if you can accuarately account for the 'to-move' >value you will tend to avoid the odd / even ply evaluation oscilations. These >were far more prevelant five+ years ago. > >Steve Yes, the problem is that you want to favor positions where you still on move at the end of the line, and you'll have both in your search. I used this kind of fudge a long time ago, but I took it out. There may be a theoretical best bonus value, and it may change during the course of the game. If you get it wrong, you probably destabilize your search and go a little slower. bruce
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