[Computer-go] living by two false eyes

Petr Baudis pasky at ucw.cz
Sun Apr 3 12:08:14 PDT 2011


On Tue, Mar 29, 2011 at 12:07:21PM +0800, Aja wrote:
> >Even in the 2nd case, 2 corners can be played, but when
> >B plays the third, then it sets the entire group in
> >self-atari. A self atari policy should avoid that.
> >
> >So if the playout policy surrounds the groups first
> >(most of the times) because the false eyes have very
> >low priority, the playout policy should get the result
> >ok.
> 
>    Erica has the rules/policy you describe here. But I think it's
> still not enough to solve this case completely, because the string,
> living by 2 false eyes, may have many liberties. Then there will be
> still bias in evaluation. I believe we can solve it 100% correctly.

Pachi has the same rules, and fails miserably in these cases, since the
chance that the false eye owner will fill it before *all* outer
liberties are filled is quite high. It did not occur to me yet how to
fix this without incurring a large performance penalty.

				Petr "Pasky" Baudis



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