Re: [gnugo-devel] Re: snapbacks

[Gunnar Farnebäck]

Dan wrote:
> It seems to me that unless it is to make a ko threat,
> a snapback capture is never the correct move. This is a
> sanity check that is easy to implement reliably. Maybe
> after the trymove at value_moves.c:887 one should bail
> out if the move is a snapback capture.

This is too optimistic. White to kill black:

+---------+
|.........|
|OOOOOOO..|
|OXXXX.O..|
|XXOOX.O..|
|XO.OXXO..|
|XOO.OXO..|
|OXOOOXO..|
|O.XXXXO..|
|OOXOOOO..|
+---------+

I'm sure there are less weird positions where playing into snapback is
correct as well.

/Gunnar