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Subject: Re: Draw Detection by Move Repetition Procedure -- Comments

Author: Rémi Coulom

Date: 10:11:40 08/01/04

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On August 01, 2004 at 12:40:26, Djordje Vidanovic wrote:

*>On the other hand, we should emphasize that we _do not_ use the 64-bit Zobrist
>hash key, but a different type of hash (best move hash with a 24-bit key) which
>cannot be used for draw detection as many different positions can generate the
>same key.  Our experiments have shown that using Zobrist hash in the extender is
>rather inefficient.  To speed up the search, the extender must be «cleansed» as
>much as possible.

Hi Djordje,

I do not understand this paragraph. Can you explain your type of hash more ? How
can it be good enough for hashing if it is not good enough for draw detection ?
what is the "extender" ?



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