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Subject: Re: Exact value of second best move in AlphaBeta with aspiration Window

Author: Dieter Buerssner

Date: 15:10:26 08/01/02

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On August 01, 2002 at 18:02:36, Ulrich Tuerke wrote:

>On August 01, 2002 at 17:45:33, Dieter Buerssner wrote:
>>If you get a fail high here - why research? You already know that it is not an
>>"easy move".
>
>... because it could be even better than the current best move.

Ooops. Of course - thanks for pointing out my blindness. But still, in this
case, wone could speed it up a bit. Only research with window(s-1,s) and only
when this fail high, too, research with a bigger beta. Exactly the same as a
normal PVS search at the root would do. So, I still think the fail high case
here is not special, and the added effort comes not after the first fail high
with the lower window, because everything what follows, would need to be done in
a normal search anyway. Or is there some other blindness in my argumentation?

Regards,
Dieter



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