Author: Omid David Tabibi
Date: 14:14:30 07/14/04
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On July 14, 2004 at 17:07:37, Peter Berger wrote: >On July 14, 2004 at 16:53:39, Omid David Tabibi wrote: > >>One iteration deeper Falcon switches to the other move which results in actual >>threefold repetition. >> >>In other words, had Crafty not had the hardware advantage it would have missed >>the win, > >Most probably correct, agreed - although of course this is not about hardware >advantage, but just about its own hardware . I could try it on my notebook, but >I will just have a look at the logfile later. > > >> and had Falcon had the 4x hardware it would have found the correct draw >>(and with that hardware advantage probably also found a correct winning line). >>Right? > >That's speculation when it is about the win. But no speculation as to the draw on equal hardware (whether both ran on 4x or 1x). >You have access to Falcon - show me >a winning line found by it with more time. The game was very interesting; I >would be interested to discuss and analyze it. I will surely analyze the game in detail. It is very hard to believe that white did not have a win there. > >Btw, you play with this 4x number very carelessly IMHO. *For Crafty* a Quad >Opteron is indeed about four times faster than an overclocked AMD2.5GHz 32 bit >system, but that's the result of programming effort. While Shredder seemed to >get a very decent speedup, the same was not necessarily true for Fritz and >Junior, judging by NPS, although I of course can only compair with commercial >versions - Frans Morsch at least seemed to be impressed by Crafty's speedup. > >You probably will have quite some work to do to reach similar speedups as Crafty >once you get your hands on a Quad Opteron :) I say "at least 4x", because each of those Opteron processors was faster than my 2.0GHz AMD 64. In fact I think it was quite more than 4x... > > >>>And Ra8 is probably not about search at all. > >Have you tried this one too ? No, but that was not the losing move (even though it was clearly a bad move). Ra5 lost the game, when a draw could have been easily achieved by threefold repetition.
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