Re: [gnugo-devel] New owl attack pattern

[SP LEE]

> On Mon, 8 Sep 2003, SP LEE wrote:
>
> > At move 140 of the attached game, gnugo overlooked the only move to kill
> > white at B7. The following pattern solves the problem. I will run 
> regression
> > test later.
> Certainly worth trying. It would be more logical to put it in
> owl_vital_attackpats.db, however, as otherwise gnugo will continue to
> count the space to the left of (*) as a secure eye when it should not.
>
> Also, below is a suggestion to make the constraint more precise.
>
> Arend
>
> > +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
> AA.O
>
> ; (lib(A) == 3 || lib(BB) == 2) && proper_eye(c)

Yes, I agree. Should I make the patch again in owl_vital_attackpats.db?

SP Lee

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