Author: Dann Corbit
Date: 19:52:19 08/25/01
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On August 25, 2001 at 22:27:05, Vincent Diepeveen wrote: >On August 25, 2001 at 19:55:45, Dann Corbit wrote: [snip] >In fact i prefer to play zugzwang, zugzwang at a 500 processor 21264 600Mhz >21264 alpha. > >That's about 300Ghz or so. Not remotely. That machine used message passing. It's a miracle they made it work at all. >Because a world championship IMHO is about letting the best programs play, >no matter hardware. If a factor 4 speedup would be 100 rating points >according to your calculations, then what rating would >Zugzwang be at? > >Please consider that it lost from lambchop at wcc99. lambchop was searching >most of the moves 8 ply and ran at a 450Mhz PII. > >Zugzwang ran at a processor or 500 at 450Mhz and all 21164s, starting >with 13 ply out of hashtables or so. > >The 4 times faster is 100 rating points is nowadays complete nonsense. > >Speed says nothing if the conditions are met. Chess is about the weakest >point. I'm sure that bugs in diep's eval are more important than getting >another ply. Then why don't you play on a 386 if the speed is meaningless? I don't believe it for a microsecond. Take the same algorithm and double the speed, it searches deeper. If deeper is not better, your algorithm is a pure bug-pile. >Getting another 2 ply for free with diep definitely doesn't give me 100 >rating points. Of course within 2 years i will get up way more than >100 rating points and that's only 1 ply deeper then probably at those >hardware (considering the big heats cpu's produce nowadays i must see >that i'm 2 times faster in 2 years than what i can buy now in a shop), >but the progress 100% sure will be caused by improvements in eval and >not by that extra ply. I think probably you have a serious bug if additional depth (while using the same algorithms) does not help a lot.
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