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Subject: Re: Hashing

Author: Robert Hyatt

Date: 19:10:16 04/04/03

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On April 04, 2003 at 14:40:44, Russell Reagan wrote:

>I would like to know which elements of the position are commonly included in
>hash signatures, and the issues with including or excluding certain elements.
>Currently, I am including the board, the side to move, castling rights, and en
>passant square.
>
>I'm not sure how important it is to hash the en passant square, since ep squares
>regularly exist, but an ep capture is legal only a small percentage of that
>time.
>
>I'm also not sure how important it is to hash the castling rights, since if the
>castling rights are different, it's likely that the board is too.


All are important.  I do what you are doing in fact...




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