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Subject: Re: 6-man TBs

Author: Eiko Bleicher

Date: 02:51:37 02/02/05

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>>>KRPKRP (only the white-side is available from Bob right now?)
>>
>>think about it.  If pieces are symmetric you only need one side.  Just turn your
>>white pieces into black ones, and the black ones into white ones, and look it
>>up.  :)
>
> Actually, this is what i thought the first time i saw there are tablebases for
>white and for black, for the same endgame(KRPKP for example). So i thought they
>would have the exact same size. But no, this isn't happening.
>For example KBBKNBB.EMD is 200 KB, while KBBKNBW.EMD is 243 KB.
>Can you explain why..........????????? It seems very bizarre to me!?!?!?!?!

There is only _one_ file for symmetric material like KRP-KRP.
But KBB-K is not symmetric, one side has two bishops, the other none.
They are of different size for two reasons:
1) The number of positions is different (because of some illegal posititions
(far from all) are filtered out.
2) The compression might give totally different results.

Eiko



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