Re: [gnugo-devel] New owl attack pattern

[Evan Berggren Daniel]

On Tue, 9 Sep 2003, Arend Bayer wrote:

> Also, below is a suggestion to make the constraint more precise.
>
> > +Pattern A722
> > +#spl added 3.5.2
> > +
> > +XXO?
> > +.*XO   destroy eye, valid both on center and edge
> > +XX.O
> > +
> > +:8,s,value(45)
> > +
> > +XXO?
> > +.*XO
> > +AA.O
> > +
> > +;lib(A)==3
>
> How about:
>
> BBO?
> c*XO
> AAdO
>
> ; (lib(A) == 3 || lib(BB) == 2) && proper_eye(c)

you might even make that

; (lib(A) == 3 || lib(B) == 2 || oplay_attack(*,d,B) && proper_eye(c)

since it seems entirely possible that shortening the liberty could change
the tactical status if there is a tactical semeai involved.  I don't know
if it would be worth the time to check or not though.

Evan