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Subject: Re: Recapture Extension

Author: Ernst A. Heinz

Date: 08:05:42 03/30/00

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>Do you ever see DarkThought require a branching factor of 10-15 for occasional
>positions?

Yes, occasionally every chess program seems to exhibit this
kind of behaviour -- including "DarkThought".

=Ernst=

>>"DarkThought WCCC'99" does unlimited recapture extensions
>>(in Hitech style, i.e., capture bringing score close back to
>>root value) with a full ply increase. Yet, its effective
>>branching factor remains smaller than 2.5 in iteration #12.
>>
>>00:03:08 11.01 e5 Bg3 Be7 Nh4 Ba6 Bxa6 Rxa6 Qd3 Rb6 Qxh7 =-0.88 #61077398
>>00:07:22 12.01 e5 Bg3 Be7 Nh4 Ba6 Bxa6 Rxa6 Qd3 Nc5 Qxh7 =-0.95 #142815058
>>
>>That's why I like to speak of "scalable search" in connection
>>with "DarkThought" ... :-)
>>
>>=Ernst=
>>
>>P.S.
>>WWW pages of "DarkThought" at URL
>>http://supertech.lcs.mit.edu/~heinz/dt/.



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