Re[4]: [gnugo-devel] life & death (3.3.5)

[Arend Bayer]

Paul wrote:
> Gunnar wrote:
> >>    - check if they are connectable with moves outside eye shape (A8 and
> >>      C7 can be connected by C8, A4 and C7 cannot be connected).
>
> > This is not trivial, in the sense that we don't have a machinery in
> > place for this analysis.
>
> there's some code that analyzes probability of a dragon to escape (to
> connect to another stones). can't we use a modification here?

I think this is something different here. It looks like topological
problem to me. Just imagine that the board wouldn't end at the left of
the 'A'-column, and white stones at Z5, Z6 and Z7. Then it depends on
whether there is or could be a black stone at Z4.

> just an idea, it should be worked on a lot before coding can be
> started, that's for sure.

I think a good way to start would be: try to systematically look for
cases where the eye space analysis goes wrong for big eyes with
hostile stones inside.

You have hit an important and interesting problem here, I think.

Arend