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Subject: Re: Mate in 1 - but Fritz 6 needs 1 hour!!!

Author: Colin Frayn

Date: 10:37:57 08/13/00

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On August 13, 2000 at 11:31:10, Adrien Regimbald wrote:

>I was about to say "Yeah, I guess if you don't use anything like null move, etc
>then you could be right" .. but then I saw that you use hash tables :P  I don't
>think that I have to point out to you that the very fact that you're using hash
>tables means you can't guarantee that your search is 100% accurate .. due to
>possible collisions.

Have you seen how I do hash tables?

*grin*

>Well, that is a very impressive gain .. but I'm curious - does it hurt ColChess
>overall to be doing this?

Not that I'm aware of.  I don't think CM testing takes up any substantial time
even in normal positions with no checkmates.  Testing for CM is quickest when it
_isn't_ a CM as it only has to check a few moves.  My CM routine is pretty
heavily optimised.

Cheers,
Col



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