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Subject: Re: Here's How To Produce Multi-Piece Tablebases

Author: Bob Durrett

Date: 07:48:15 03/09/04

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On March 09, 2004 at 09:08:45, Vincent Diepeveen wrote:

>On March 09, 2004 at 08:45:07, Bob Durrett wrote:
>
>If you've got 3-4GB ram you can generate 6 men for DIEP, no problem.

That is interesting!  Suppose 7 men or more were desired?  How much RAM needed
to do the job?

Maybe most people do not have that much RAM.  That might drastically cut down on
the number of people who could generate multi-men tablebases.

Perhaps a very large computer, or maybe a special purpose computer would be
needed.  It might also be possible to create a new algorithm for generation of
tablebases which would accommodate smaller RAMs at the expense of maybe taking
longer [and much swapping with hard drive?]to generate the tablebases.

There is another issue:  Suppose that 7-, 8-, or 9-man tablebases were
available.  Would an ordinary PC be able to utilize such tablebases?  Would
existing chess-playing programs [GUIs?] be able to work with such large
tablebases?  It takes a little bit of time to load Fritz as it is.  Maybe use of
very large tablebases would make it take forever to load.

Perhaps there are other practical limitations to the use of very large
tablebases too.

Thoughts = ?

Bob D.


>
>For Nalimov you might need a bit more.
>
>With DIEP only cpu speed and memory access counts. harddisk speeds, unless very
>very slow, are not most interesting.
>
>>
>>The solution is thousands of years old.  It's called "devide and conquer."
>>
>>Simply get a large number of people to create the tablebases.
>>
>>For example, a seven-piece tablebase can be n mutually-exclusive types of
>>seven-piece endgames and then each person generate the tablebase for his/her
>>part.
>>
>>This assumes some coordination.  I hereby nominate Nalimov to do that
>>coordination.
>>
>>Bob D.



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