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Subject: Re: Null move generalization

Author: Vincent Diepeveen

Date: 06:40:00 04/18/02

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On April 17, 2002 at 15:43:23, Jesus de la Villa wrote:

With a correctly implemented double nullmove the insight
is easy to see that there is not a single position which
double nullmove cannot solve.

Normal nullmove on the other hand possibly cannot even solve
a single zugzwang (which is it's *only* drawback), because
it always allows one side to not move in a position X.

Therefore double nullmove has no drawbacks when in a game
where doing nothing is in the overwhelming case bad.

Note that a good definition of zugzwang is a position where
playing *any* move is bad for the side to move.

>
>Have someone defined the general rule(s) where null move
>is unable to find simple combinations?, and if so, which
>are those rules ?
>
>"Obviusly" is more expensive to check it than to not
>use Null Move.
>
>Thanks for asking
>
>
>
>PS. I hope you undertand my poor English :)



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