Re: [gnugo-devel] Pattern for seki (bug 175)

[Gunnar Farnebäck]

I wrote:
> Joseph Piche wrote:
>  > I believe the semeai and owl code breaks down pretty bad with this
>  > pattern. It's obvious the best move for black is B2, but when white
>  > responds with C1, gnugo gives up. The response W-C2 B-C1 W-B3 B-A3 is
>  > found with default options. But when you turn the level up, W-C1 is
>  > found. Adding S15b S15c would help there, but W-C1 B-A3 W-B1 B-C2 and
>  > white has options at W-B3 B-A2 and W-A2 which black doesn't know how
>  > to deal with. (Of course the correct response is B-A1 W-B3 B-D1 W-C1
>  > B-A2.)
>
> That's why there are many tests for followup positions in seki.tst.
> Please see
> http://trac.gnugo.org/gnugo/attachment/ticket/175/seki_tests_7_12.1
> for a bunch of followup tests in this case. They are not very easy to
> follow by hand (due to play/undo commands) but can be comfortably
> viewed with view.pike.

Actually I've added the tests to CVS right away so that they can be
even easier viewed at http://trac.gnugo.org/regression/regress.plx as
soon as that is updated, which should be in four hours or so. Please
report any mistakes or missing moves that you find.

/Gunnar