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Subject: Re: Generating endgame tablebases

Author: Robert Hyatt

Date: 21:27:17 10/10/01

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On October 10, 2001 at 22:55:27, Slater Wold wrote:

>On October 10, 2001 at 22:36:01, Robert Hyatt wrote:
>
>>On October 10, 2001 at 16:55:16, Olaf Jenkner wrote:
>>
>>>>Some took hours on a Cray (Stiller).  Figure months on a PC for those.
>>>>No idea how long the really bad ones will take (kppkpp for example.)
>>>>The promotion cases will certainly take a _long_ while...
>>>
>>>Didn't use Stiller the connection machine?
>>>I remember that I read 1991 about this.
>>>
>>>OJe
>>
>>
>>He used both.  Burton Wendroff/Tony Warnock got him some time on a C90
>>sometime in the 1993 time frame...  The advantage of the C90 is that it
>>comes with 32 gigabytes of RAM, which was helpful for making the generator
>>run very fast...  Of course, he didn't do any compression, and he couldn't
>>write the files out to anything for saving them...  but he did compute some
>>statistics about them before chucking them.
>
>Any idea where to get those statistics Bob?


I believe Lewis published some of them quite some while back.  But the
thing he published was mainly "deepest mate" and the like.  I didn't follow
this very closely, and only remember Wendroff asking for "my contact" up at
Cray in trying to set the time up...




>
>Who is compiling them now?

Only Eugene so far as I know...



>
>How hard is it to get time on a Cray?
>

Have you noticed a "lack" of "cray blitz"?  Draw your own conclusion.  :)

The machines sell for $60,000,000.00 or so.  So yes, it takes a lot of
haggling to get time...

At one time CPU time was going for $20,000 per hour...






>
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>Slate



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