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Subject: Re: recursive nullmove question

Author: Peter Fendrich

Date: 13:45:56 08/13/99

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On August 13, 1999 at 16:20:13, vitor wrote:

>hi,
>i know how nullmove pruning works, but could someone please explain how
>recursive nullmove works? is it just doing lots of consecutive nullmoves?
>thanks

It means that you allow several nullmoves within the same path in the search as
opposed to ensuring that no more Nullmoves will be done below this one.

Not consecutive, however. It is no good idea to answear a Nullmove with another
one. That will be two "pass" after each other and nothing happens. So no
Nullmoves in the ply directly following a Nullmove, but in the next ply further
down it's ok again.

//Peter




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