Author: Otello Gnaramori
Date: 05:57:56 11/18/01
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On November 18, 2001 at 08:49:06, Uri Blass wrote: >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are outdated.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make DBs outdated, 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. Uri , you anticipated me for few minutes...I was just going to write the same matter on null move forward pruning... > > 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 Well, Uri is a real expert and did the analysis , so you get what you wanted. > >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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