Author: Uri Blass
Date: 05:09:34 12/23/03
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On December 23, 2003 at 06:47:18, Amir Ban wrote: > >Thanks for running this match and for the interesting commentary. > >My point in playing this match was never to show how weak crafty is, but >something different: Too many programmers and posters in this forum take the >speed issue way too seriously. They don't understand the importance of >evaluation, and when they do think about it, they think it's about pawn >structure and a few super-rare endgame tableaus. > >I also needed to check that I've not been wasting my efforts in the last few >years. > >Merry Christmas and Happy Hanukka, >Amir I do not claim that evaluation is not important but my opinion is that search is not thing that is less important. I also know that inspite of the fact that you say that evaluation is important your evaluation takes only 20% of Junior's time(I do not know about latest Junior but I know about previous post of you). How is it possible? Did not you find important things to evaluate that it is simply impossible to evaluate them fast? For example let talk about pieces that are in danger of being trapped because the opponent control every square that they can goto. There are cases that you need to search many plies forward to see by search that they are really trapped but a good evaluation should detect the danger. Correct me if I am wrong but I guess that you do not evaluate this information in every node that you evaluate otherwise you cannot be faster in nps than the opponents. Did you consider to evaluate this information or do you think that this information is not important? I think that evaluating expensive information in part of the cases is probably the best practical idea. Based on my understanding Rebel is using that idea when it evaluates every node before qsearch by full evaluation and use lazy evaluation after it when the lazy evaluation can miss only factors that were not relevant before the qsearch. Do you use a similiar idea? Uri
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