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Subject: Re: Practical Tablebases (much smaller) ?

Author: Uri Blass

Date: 09:03:31 11/13/01

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On November 13, 2001 at 10:09:30, Robert Hyatt wrote:

>On November 13, 2001 at 08:31:09, William Penn wrote:
>
>>I suspect this has been discussed before but I didn't pay attention, so please
>>pardon my redundancy. If you could just point me in the right direction, much
>>appreciated...
>>
>>Can't we make some assumptions without compromising very much practical playing
>>strength and significantly reduce the size of the endgame tablebases? For
>>example it seems a waste to generate separate positions for "white to move" and
>>"black to move".
>
>How would you handle all the common zugzwang positions?  black king at e6,
>white king at e4, white pawn at e3.  White to move draws.  Black to move
>loses.

There is a solution for it.
You probe the tablebases only when the right side is to move.

I understand that calculating the moves when you are in a tablebases position
becomes more comlicated but it can be solved by 2 ply search.

Uri



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