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Subject: Re: Cray Blitz

Author: Vincent Diepeveen

Date: 17:02:29 08/02/01

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On August 02, 2001 at 10:17:14, Robert Hyatt wrote:

>On August 02, 2001 at 09:32:52, Vincent Diepeveen 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.
>>
>>Such a crafty would not win wcc2002 for sure.
>
>At 30M+ nodes per second, I would certainly take my chances and be quite happy
>about it.

Getting out of book with -2.0 instead of -1.0, only because you
search a bit deeper in the same position, that's giving a kind of
feeling which is quite the opposite though :)

>
>
>>
>>>Pure speculation, of course.



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