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Subject: Re: A Null Move Enhancement?

Author: Will Singleton

Date: 13:21:06 02/11/99

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On February 11, 1999 at 12:52:27, Bruce Moreland wrote:

>On February 11, 1999 at 08:23:10, Peter Fendrich wrote:
>>Can't check that from here, but it "must be":
>>"Null Move and Deep Search: Selective-Search Heuristics for Obtuse Chess
>>Programs." Donninger, C. (1993).
>>ICCA Journal, Vol. 16, No. 3, pp. 137-143. (A)
>>I tried it but it was no hit.
>>That doesn't mean that it couldn't work for other programmers in other
>I expect that Ernst will respond, because he refined it and I think still uses

I tried it (only allowing null-move when material imbalance exists) and found
very little change.

Regarding your thought about threat-detection and null-move, a reading of
Anantharaman's article (ICCAJ 1991) indicates that he found little or no benefit
to this.  But I remember something about you detecting mate threats with null
move.  Is that right?


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