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Subject: Re: Generating endgame tablebases

Author: Slater Wold

Date: 21:43:57 10/10/01

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On October 11, 2001 at 00:27:17, Robert Hyatt wrote:

>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...

Ok.  Thanks.

>
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>>
>>Who is compiling them now?
>
>Only Eugene so far as I know...

On what?  And how is he doing the 6 pieces?  I thought you needed a 64-bit OS
and a LOT of memory and HD space.

>
>
>
>>
>>How hard is it to get time on a Cray?
>>
>
>Have you noticed a "lack" of "cray blitz"?  Draw your own conclusion.  :)

Well, it was running at one time!  What's the difference between then and now!?!

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

Jeez....

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

Man oh man.  I went looking up Cray's, (other than www.cray.com) and all I could
find was crap about Cray, Inc. suing the United States of America.  (The CIA was
one of the organizations involved.)

So renting one for a day is pretty much outta the question for me.....as I don't
have $480,000 to blow.

What a shame.

>
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>>Slate



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