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Subject: Re: reducing null-move searches

Author: Ulrich Tuerke

Date: 07:46:05 11/17/97

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Hi !
Okay, now I see the idea. In fact, if Bob got it right, then the idea is
some kind of "fail high reduction" as suggested by Feldmann. However,
Feldmann's suggestion is not that radical: he just reduces the number of
plies to the horizon by 1, if score >= beta- thus still including the
quiescence search. One would also have to account for a large number of
exclusions to make this reasonably work (do not cut when in check, when
the side to move has hanging pieces, and so on).
In any case, this idea is worthwhile to experiment with it. In my
program I implemented some similar algorithm at depth=1. This a forward
pruning mechanism which is completely independent of null move
heuristics.
By the way, Feldmann's article was published in some conference
proceedings in 1996 as far as I remember.

Regards, Uli



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