Author: blass uri
Date: 14:12:02 07/26/00
Go up one level in this thread
On July 26, 2000 at 16:59:35, leonid wrote: >On July 26, 2000 at 13:40:32, Tom Kerrigan wrote: > >>On July 26, 2000 at 09:18:41, leonid wrote: >> >>>Hi! >>> >>>How ask Fritz execute brute force search? I have Fritz 6 but if it is possible >>>for some other version (even better DOS version), please say me. >>> >>>Recently I went to see Fritz nodes per second performance. Very impressive! Only >>>maybe I am missing exact numbers. NPS tend to grow when search is done by brute >>>force. This is why I try to find where Fritz numbers stays in real. But Fritz, >>>in dispite of its performance, is not exactly open minded piece of software. >>>Even its NPS I was able to see only through my Hiarcs 7.32 program. >>> >>>Thanks in advance, >>>Leonid. >> >>My search is selective only because of null-move. I believe this is also the >>case with Fritz. >> >>With null move on, my program searches 634k NPS. (BK, short searches) > > >On what hardware do you have 634k? I was very impressed with Fritz numbers only >because they were between 220 and 320k on AMD 400Mhz. Your numbers are almost >twice as fast. > >On the same hardware average NPS for other best programs were, for similar >positions, between 140 and 180k. I see that you are more that lucky with >numbers. > > >>With null move off, it searches 655k NPS. >> >>The difference is 3.3%. > >Good to know that this difference is negligeable. > > >>Basically, I wouldn't worry how much faster Fritz is without null move, for >>three reasons: >>1) The difference is probably pretty insignificant >>2) You'd never want to run Fritz without null move in real-world situations >>3) You didn't write Fritz > >With few exceptions (Hiarcs is the most flagrant one) I found that NPS is good >indicative of the strength of the chess program. Inside of Hiarcs package (tried >only few positions) Crafty had the best NPS immediately after Fritz. It is >probably the most strong engin after Fritz as well. Junior searches more nps than Crafty but there are other strong programs with less nps(Chessmaster6000 or shredder4 are good examples). Uri
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