Author: Steve Maughan
Date: 05:17:34 02/10/06
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Uri, A classic 'Uri' post on your part :-) >We do not know if the evaluation of rybka is more complex than fruit's >evaluation so I disagree that rybka pulls us in the other direction. Of course we don't - we don't have access to the source. But looking at it's play it certainly seems to have a sophisticated evaluation function. I would say that my original statement is in line with perceived wisdom. >I also do not consider the evaluation of fruit to be a simple evaluation >function. Fruit 1.0 and 1.5 didn't have particularly sophisticated evaluation function (piece square and basic mobility [1.5]), yet they were both able to play at the same level as Crafty. For me the early version of Fruit were much more influential since they could play such good chess with a relatively simple evaluation function. So adding knowledge is clearly going to improve the strength dramatically - and that's what happened. >There are a lot of chess programs with more simple evaluation than fruit. Sure - TSCP for example. But you cannot name one program that has a simpler evaluation function than Fruit 1.0 and plays a stronger game. Regards, Steve
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