Author: blass uri
Date: 00:48:15 03/27/99
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On March 27, 1999 at 01:34:14, blass uri wrote: > >On March 27, 1999 at 00:09:50, Brian MacAskill wrote: > >>Excuse my ignorance (computer chess is a brand-new interest for me), but why >>*does* Fritz beat Crafty? >> >>I bought Fritz 5.32, and I run the Crafty 16.5 engine under it. Fritz usually >>beats Crafty (though not easily... Crafty puts up more of a fight than any other >>(free) engine I have). > >Crafty16.5 under Fritz5.32 is not the real crafty. > >It has not crafty's opening book and there are other problems. > >I find that even when there is mate in 1, crafty16.5 (as an engine for Junior) >"feels" a duty to use its time when the real crafty does not "feels" this duty. >It does not change the result of the game but it proves that crafty as an engine >for Junior is a modified crafty and not the real crafty. > >I do not have Fritz5.32 but I guess that Crafty as an engine for Fritz5.32 has >the same problem. > >The real crafty in ICC is a parallel machine and it is part of the program. > > > >> >>So what's the reason? >> >>Is Fritz the result of a team of programmers, while Crafty is the work of one >>(apparently very talented) man, Dr. Hyatt? Or is it vice-versa? > >No >The source code of crafty is free when the source code of Fritz is not free and >it gives an advantage to Fritz but I do not think that Fritz is better than >Crafty. > >The real test is to give Crafty and Fritz the same rights to choose every >machine that money can buy (including parallel machine) and do a match between >them at tournament time control. > >If Fritz5.32 cannot earn from parallel machine then it is Fritz's problem >because the possibility to use parallel machine is part of the crafty's program. > >If Fritz can win Crafty in this test then Fritz is better than crafty. Mark young told me that his tests show that Fritz is better than parallel crafty. Results against Fritz5: Matches with Bob Hyatt. Fritz 5.00(PII300) Vs. Crafty(Quad Ppro200) Fritz 5 wins +5 -0 =0 TC 120min 180 sec incs. I read about these games here but I know that crafty has a bug in these games. Results against Hiarcs7 Matches with Bob Hyatt. Hiarcs7(PII450) Vs. Crafty(Quad Xeon PII 400) Hiarcs7 wins +5 -2 =1 TC 10min 20 sec incs. Server games with Hiarcs7 against Crafty. TC - Blitz from 5 min 5 sec incs. to 5 min 12 sec. incs. Hiarcs7(PII 450) wins +28 -5 =7 Avg. speed of the crafty's per game was 668 MHz. Most games were against multi-cpu Crafty's. Uri
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