Re: [gnugo-devel] endgame tuning

[Gunnar Farnebäck]

Arend wrote:
> So maybe we need s.th. analogous to Gunnar's "vulnerabilities" in the
> connection reading. We should note that the blocks at G5 and F6 try to
> block influence coming from G6. And consequently remove one of the
> blocks.
> 
> This solution could help against the problem of sometimes horribly
> undervalueing opponent's intrusions into GNU Go's moyos.

Agreed, something like this might be effective.

> How do we learn that the block at F5 is trying to block influence from
> F6? Either we add this information to the patterns in barriers.db.

My guess is that doing it through patterns is most feasible. Possibly
special patterns for this purpose. In fact some intrusion patterns try
to work around this problem already, e.g. Intrusion46, although rather
inexactly.

> Or we check it _after_ spreading the white influence: We just check all
> intersections with white influence, whether it has two neighbors with
> blocks.

This sounds too general. If nothing else I fear it would require much
more careful influence tuning to avoid accidentally getting into this
situation.

> If yes, we remove one of them, and respread the influence from this
> intersection.

This begs the question how we decide which of them to remove...

/Gunnar