[Computer-go] living by two false eyes

Don Dailey dailey.don at gmail.com
Thu Apr 7 05:02:36 PDT 2011

On Thu, Apr 7, 2011 at 6:09 AM, Petr Baudis <pasky at ucw.cz> wrote:

> On Wed, Apr 06, 2011 at 10:11:05AM -0400, fastgo wrote:
> > In StoneGrid, it has built in the Benson algorithm in the playout. It
> does
> > not seem to help much on overall strength. But I think it should solve
> the
> > case here.
> >
> > I think you can implement the Benson Algorithm in the late stage of the
> > playout.
> >
> > It has another advantage finishing the playout in shorter length. In
> > StoneGrid, the playout on average finishes in a little bit more than 70
> > stones on 9x9.
> >
> > You need quite a lot of effort to get it fast as well as correct. So the
> > return of the effort is low.
> Do you also use this on 19x19?
> One of my long-standing worries is that especially on 19x19, the playout
> takes awfully long and the second half of the moves are almost all
> totally meaningless, but with all the expensive heuristics etc. still
> being computed. It seems to me that a lot of time is wasted this way
> and that Benson life detector would help even much more here, so I'm
> surprised you do not see it as that much of an improvement.

Benson is very slow to calculate so it is not a free speedup.

> --
>                                Petr "Pasky" Baudis
> UNIX is user friendly, it's just picky about who its friends are.
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