Re: [gnugo-devel] OWL failure !?

[SP Lee]

> 1/
> In this final position ,black never plays 133 =K13 (or L13) despite
the fact
> that there is a lot of matching patterns.
> (at least for K13).
>
> GG invoked with --T first shows  the H16 dragon as dead(green)  but
OWL does
> rescucite it .
>
> When we make a trace of OWL's thinkings , we get this variation
>
>  Pattern A1001b found at K14 with value 50
>           Trying black K14. Escape = 2. Current stack: B:K13 W:M13
B:M12
> W:N13 B:K14  (variation 6)
> Variation 6: ALIVE (escaped)
>
> this conclusion of course is wrong.
>
> 2/ If we consider the previous white move : 132 white M11 , we can
help
> GNUGo with this kind of pattern which makes it to play 132 M13
>
> Pattern EC221
>
> ?oOoo
> Xo.o?
> o*.oO
> O.X??
>
> :8,C
>
> of course , this does not solve the OWL failure .
> I would have a question about whether 132 should be correctly played
if OWL
> could solve 133 .
>
> If someone has a pattern solution for the 133 move , i would be
interested
> to know about it too.
> Thanks
> md.
>

To my understanding this is a problem of escape value calculation,
rather than pattern matching. So it couldn't be really solved by adding
any pattern.


SP Lee