Author: Thomas Mayer
Date: 16:54:48 12/20/01
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Hi Christophe, > 2) My program as well as other commercial > engines are using search techniques > that have never been published. well, I think that is the main reason why they are stronger (among others, better testing, more time etc.) and will stay stronger... But I think new techniques could be also discovered by Amateurs - not so long ago you was also Amateur - and I am totally sure that you have VERY special search techniques and pruning methods - else I do not understand the depths the Tigers are reaching... It's really amazing to watch... :) >> Perhaps some are using forward pruning techniques that are not >> published anywhere. The degree to which this affects their playing strength >> is debatable. >No it's not. It makes commercial programs clearly stronger. In my opinion, "correct" prunning is they best way to get stronger and stronger... As you said - nullmove can't be everything... believe me, I am searching, maybe I will find someday something... And I am totally sure all the others are also searching... futility pruning for example is an idea, but I don't use it myself because it don't seems to be a win for my engine... and chess is complicate enough that there could be many many many ..... many more ideas... prunning is always risky, but if you find a good and robust way, it is overall a win... and I believe, YOU have found something and the others for sure also... As long as chess programs evaluate 99,999% totally idiotic positions there is a way to prune something away... The question is: HOW... :) Greets, Thomas
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