Author: leonid
Date: 11:44:08 06/16/00
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On June 16, 2000 at 14:34:50, blass uri wrote: >On June 16, 2000 at 13:16:57, leonid wrote: > >>On June 16, 2000 at 12:34:58, Michel Langeveld wrote: >> >>>No nps of alpha-beta and minimax will be almost the same. But the total number >>>of and the total amount of time will be a much lesser. >> >>Your first statement sound to me as something near to impossible. Just recently >>Bas Hamstra said that minimax speed is around 800000 nodes/second. Computer was >>indicated as Pentium 466M. Usual number of nodes/second that I see on my AMD >>400M (for some best chess games like: Crafty, Xchess, Comet...)is around 150000. >>Even from this I can see that: 800000:150000=5.3 times. > >Crafty does not use only alpha beta. >It is using also an evaluation function and it also waste time about better >ordering of the moves. I mentioned only alpha-beta as the main element, leaving moves ordering and so like as too long to say in one breath. But minimax I understood as nothing but it. Seeing just all the nodes in each ply one after another. >I remember that I read that crafty is using about 50% in the evaluation so it >can be twice faster in nodes per second if it will use only material evaluation > >It can be even faster in nodes per second if it will not waste time about better >order of moves. > >Uri
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