Author: Dave Gomboc
Date: 00:08:45 08/09/99
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On August 09, 1999 at 02:41:45, david burrell wrote: >There is a huge variation between the NPS reported by a variety of >chess software. I realize that there are many factors that might >effect NPS like move-ordering, complexity of static eval, hashing etc. >but perhaps not all chess programs count the same thing. > >So what do you define NPS as? I would count calls to make-move. This is >what my program does. I have heard that some people count total nodes >generated by movgen and others count only leaf nodes. "NPS" reminds me of an amusing quote of unknown attribution: "The wonderful thing about standards is that there are so many to choose from." >I am concerned that my program is very slow, about 15K NPS in opening >positions on a P200, (crafy reports about 50K NPS). How does crafty >count NPS? > >If the LG2000 winboard engine has peaked at over 1M NPS on a K6-2/450 >then surely LG2000 is not counting calls to make-move 1M is very high!! Who knows? You'd have to ask the author, I think. >Any comments would be greatly appreciated. Thanks. > >David. IMO somebody should examine NPS values and see if they can be used as a random number generator with normal distribution. :-) Dave
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