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Subject: Re: Pawn race tb

Author: Robert Hyatt

Date: 07:29:56 07/14/99

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On July 14, 1999 at 01:30:22, Dann Corbit wrote:

>On July 14, 1999 at 01:20:26, Dann Corbit wrote:
>
>>It might be interesting to make a pawn race tablebase for large numbers of
>>pieces.  Suppose that you have 2 king and x/y pawns left.  It might be
>>worthwhile to compute "how many plies till I convert?  How many plies till enemy
>>converts?"  If I have a two ply advantage, it seems significant.
>>
>>If you have a king and three pawns on both sides, we could never count all
>>possibilities.  But we could find out how fast we can convert.
>Where is such a thing useful?
>I think it unlikely to find two kings and 12 pawns on the board.  And 5 piece
>tablebase files are common.  So for small numbers of pawns, yet too many pieces
>for the tablebase files, it might be very useful information.
>
>Also, since we know we are computing a pawn race, it may simplify calculations.
>Because we stop once we convert (or perhaps a couple moves after) it would not
>be nearly as difficult as a complete endgame tablebase.


Tablebases are not nearly so hard to compute as they are to store, already.
Just remember that you need roughly 64^N bytes, where N is the number of
pieces on the board counting kings.  for N > 5, this is _huge_.



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