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Subject: Re: Nullmove: when to avoid it?

Author: Ernst A. Heinz

Date: 12:55:02 02/28/01

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Hi Severi,

>>Should I also omit it in some other cases,
>>for example, when any hashmove (even with a low draft) was found,
>>or when beta = alpha + 1?
>I avoid it also when it seems that this node is futile: material+MARGIN<=alpha.
>It saved a few nodes and it seems to be quite sound assumption.

Yes, the same in "DarkThought" -- see my article on AEL pruning
and/or the accordingly named chapter of my book (pp. 54+55).


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