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Subject: Re: 6 man tablebase question

Author: Russell Reagan

Date: 19:49:22 02/09/02

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On February 09, 2002 at 22:35:54, Robert Hyatt wrote:

>Several issues:
>
>1.  6 piece files are going to require some large mate-in-N scores.  IE they
>will need 16 bits at least, which doubles the size compared to a current 5
>piece file where all scores are 8 bits max.

Why would you need to use a full 16-bits? And why would you add on "at least" to
that? How many mates are going to take more moves than 65,536 moves without
reaching a 50-move rule point or 3-fold repitition? The answer is none. Maybe
you could explain why my reasoning doesn't work.

>2.  another piece multiplies the size by roughly 60.

No greater than 58, and less than that in practical play :P

>3.  Unknown compression ability.  We already have some 6 piece files that
>are 3+ gigabytes.  These are pawnless which have max symmetry.  Pawns will
>increase that significantly.



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