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Re: [gnugo-devel] Terrible move

From: Gunnar Farneback
Subject: Re: [gnugo-devel] Terrible move
Date: Wed, 21 Nov 2001 18:06:40 +0100
User-agent: EMH/1.14.1 SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.3 Emacs/20.7 (sparc-sun-solaris2.7) (with unibyte mode)

Allan wrote:
> Here's a game where GNU Go makes a fairly catastrophic move at move 216. 
> The odd thing is that if asked to generate a black move instead it sees 
> that it can kill...

To GNU Go the upper right corner is a semeai situation and the semeai
module isn't good enough to handle it. Dan, this is a good test case
for an improved semeai module.

Trevor wrote:
> Here's a curious position, derived from your submission:
> $ gq -l c:\\y.sgf --decide-dragon S15 -o x.sgf
> finished examine_position
> S15 cannot be attacked (8 variations)
> S15 cannot be defended (2 variations)
> In other words, if black plays first White's alive.  If white plays
> first, he's dead.    Yikes.

This is an unfortunate effect of some complex interactions between the
tactical reading, the owl reading, and the eyespace analysis.


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