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Subject: Re: Is anyone generating *any* 6-man tablebases?

Author: Dave Gomboc

Date: 17:07:21 09/11/99

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On September 11, 1999 at 19:55:47, Eugene Nalimov wrote:

>On September 11, 1999 at 16:07:15, Pete R. wrote:
>
>>I know the issue of 6-man tablebases and how much space they would take crops up
>>periodically (and don't throw tomatoes but I don't recall the answer), but is
>>anyone actually generating any, or plan to in the near future?  Dr. Nalimov?
>>Just a handful of the most commonly needed would be nice, e.g. krpkrp, or
>>krpkpp.  Kasparov vs the World could sorely use kqpkqp. ;)  What would it take
>>to generate and store just a few for the most common endings?
>
>I am not doing that. Have no time, and, as I am moving to other group inside MS,
>soon will have no large servers (that can be used over weekend).
>
>I beleive that for 6-man tables you have to use much more efficient backward
>algorithm developed by Stiller (I beleive all others used forward algorithm, as
>it is simpler to implement and debug). Also, 8-10Gb of RAM will be a great help,
>otherwise you'll have to use less efficient disk-oriented algorithms.
>
>And the latter means that you have to use 64-bit CPU as well as 64-bit operating
>system.
>
>Eugene

Stiller took extensive advantage of symmetries that are not available in
arbitrary six-piece endgames, though.

Dave



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