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Subject: Re: Compact encoding of chess positions

Author: Ricardo Gibert

Date: 18:54:05 03/04/05

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On March 04, 2005 at 04:36:19, Reinhard Scharnagl wrote:
...

>
>  "For each performed promotion there also must have been captures
>  during the game: one pawn or half an officer."
>

3 promotions per capture. The reason why is illustrated with the following
scheme:

[D] 8/8/8/2pppp2/2PPPP2/8/8/8 w - -

After the 2 captures 1.fxe5 cxd4:

[D] 8/8/8/3pPp2/2PpP3/8/8/8 w - -

6 pawns will promote.

...



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