Author: Uri Blass
Date: 05:49:06 11/18/01
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On November 18, 2001 at 08:13:48, Jesper Antonsson wrote: >On November 18, 2001 at 05:06:24, Otello Gnaramori wrote: >>>Otello, there is not enough information available for you to make such claims. >> >>Please see my answere here : >>http://www.icdchess.com/forums/1/message.shtml?197927 > >Well, you don't show anything there to back up the claims that their algorithms >are outdated. No new revolutionary algorithms have been presented that would >make DBs outdated, It is known that DB did not use the null move pruning. The null move pruning was known in 1997 but they did not use it. and how complex/good their eval is we don't know. Since they >could make complex eval for free in hardware, it might just be much better than >todays micros. I do not believe that it was better than today micro. I analyzed the games andthe fact that deeper blue could not see Qe3 in the pv of game 1 suggest that their search rules and their evaluation was inferior. I saw no evidence for a move that top programs of today need a long time to find and other people also analyzed the games and found no evidence for it. It seems that every move in the games can be played after some minutes by one of the top programs(not always the same program). > >Perhaps a real expert may be able to say something about this if he was to >scrutinize the DB moves in the last match and compare them to the moves Fritz >would make if given a lot of extra time. But it would be hard to be fair there, >since "nodes" aren't equal. > >Regards, >Jesper My impression based on analysis that Deeper blue was only 2-3 times faster than Deep Fritz on p800 in some cases because deep Fritz was 2-3 times slower in finding similiar pv to Deeper blue. There are logfiles of the games of the last match deeper blue-kasparov so it is possible to check it. Uri
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