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Subject: Re: Hash move question

Author: Jeff GAZET

Date: 13:20:12 06/25/04

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>>in the search function, when i've got a corresponding hash entry for the current
>>position, i look as the hash move. And this move is not valid for the current
>>position (i.e. there is no piece on the from square), how is it possible as
>>current hash and the hash in the table are the same ?

>Hi Jeff,
>Because the hash key, even when 64-bit long, does not uniquely represent
>reachable chess positions.  Although *very* unlikely, two different positions
>can share the same hash key.

Hi Fabien,
ok, thanks. I'm going to track this.

>However in practice if you encounter any illegal moves during the search, it
>usually indicates a bug somewhere else.
>Fabien.

No i do not.
Is your email *@hotmail ok ? i sent you a mail.



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