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Subject: Re: extensions

Author: Tord Romstad

Date: 08:25:11 12/26/97

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On December 26, 1997 at 02:40:01, Christophe Theron wrote:
>
>I gave up using these "threat evasion extensions", because I don't use a
>SEE any more, and it was not clear that it strengthened my program.
>Surprisingly, the improvement, if any, was a positional one. Not
>tactical.
>
>Jean Christophe Weill describes some threats extensions (entropic
>extensions) for the old Joker program in his PHD thesis (in french...).
>He also gave up using them.
>

I believe that M-Chess uses lots of threat extensions. The program
sometimes
produces very long main lines with few captures and checks, even at low
search
depths.

Tord



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