Re: [gnugo-devel] New owl attack pattern

[SP LEE]

> On Thu, 11 Sep 2003, SP LEE wrote:
>
> > I happened to find that the pattern A719 in owl_attackpats.db does
the
> > similar thing, only it can't be matched on the edge. So it seems to
be
> > reasonable to modify A719 instead of adding a new pattern. However,
I'm
> > again not familiar with the constraints in A719 and I'd like to here
> > some comments about it. At first glance, we may just want to merge
the
> > constraints together, but I'm not sure some of them is really
necessary.
>
> Why can't it be matched on the edge?  It looks fine to me.
>
> The constraints could probably use a little work.  Checking the
tactical
> stability of all the relevant strings is probably correct, but it
should
> be done for both X strings (not just one like in A719), and should be
done
> after the move is played (eg, an oplay_attack() constraint).
>
> Evan Daniel
>
>

On the edge the eye could be like

|XXO
|..X
|XX.

So it can't match

?XXO
X..X
?XX.


SP Lee