Author: Vincent Diepeveen
Date: 06:31:34 08/02/01
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On August 02, 2001 at 08:53:38, Robert Hyatt wrote: >On August 02, 2001 at 03:56:58, Dann Corbit wrote: > >>On August 02, 2001 at 03:32:12, Joshua Lee wrote: >> >>>Since Deep Blue isn't around playing games these days the only "Real" >>>Competition That is on the level of DeepThought or Blue would be Cray Blitz. >>>How does CB compare to the Deep's? I know DT could be searching 10Ply find a >>>move but a regular Fritz might take 20+ ply I am guessing that CB is closer to >>>the Deep's than your average program ... What kind of differences between Cray >>>and Commercials are there in eval "IF" that's a BIG "IF" eval is the main >>>difference between the two. How much memory went to Hash Tables etc? Is the >>>Depth = to Crafty only just deeper in searches? In other words is 12ply for CB >>>the same as Crafty? I played a game Between Fritz and Crafty at 12ply each and >>>then 12ply for Crafty and 14 for Fritz , Fritz lost both not that this says >>>much as Fritz at 12 ply took tops 1:30 while Crafty took up to 30 minutes but at >>>14 Ply for Fritz it was not enough in the endgame. I don't know how much Depth >>>is good for fritz but it looks like 12Ply is a decent minimum for Crafty for >>>most positions except in the endgame. >>> >>>Also i asked about the games of Crafty Vs Cray Blitz when will these be >>>available? >> >>Cray blitz had memory bandwidth as a big advantage. But personally, I think the >>8 way SMP boxes running Junior or Fritz would give cray blitz all it could >>handle. >> >>On the other hand, put crafty on a 64 way SMP Compaq Alpha machine, and only >>Deep Blue would have a chance against it. >> >>Pure speculation, of course. Is there any possibility to play a testgame(s) DIEP vs cray blitz somehow? If i understood well, you got like 11 to 12 ply with Cray Blitz, just what i get with diep at a dual machine? >I would disagree. Cray Blitz was very similar to crafty, other than it didn't >use recursive null-move or R=2. But those would be tiny changes to enable. And >it would then be searching just like Crafty, just at 7M nodes per second >rather than 1M... > >And CB had some eval things that I can't do in crafty due to memory bandwidth >limits... I do not see the connection between evaluation code and needing bandwidth for it. As far as i know evaluation has only to do with the way the processor is working. Isn't that the case here? Best regards, Vincent
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