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

From: Gunnar Farnebäck
Subject: Re: [gnugo-devel] Pattern for seki (bug 175)
Date: Wed, 02 Jan 2008 22:34:45 +0100
User-agent: Mozilla-Thunderbird (X11/20071008)

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
> 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 as
soon as that is updated, which should be in four hours or so. Please
report any mistakes or missing moves that you find.


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