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Re: [gnugo-devel] owl:6
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From: |
Gunnar Farneback |
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Subject: |
Re: [gnugo-devel] owl:6 |
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Date: |
Fri, 08 Aug 2003 00:22:58 +0200 |
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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) |
Dan wrote:
> > Test case owl:6 is wrong, isn't it? If white plays B5 (the listed
> > move) and black answers at B6, I don't see any continuation for white.
> > In fact I don't see any defense at all. Can someone confirm?
>
> How do you continue after W:C4?
Black C1 kills. This position can be found on page 98 of All About
Life and Death (by Cho Chikun).
> It seems after black B6, white B4 makes a ko, but I don't remember the
> sequence and it is a difficult problem. I'll try to figure it out.
No way. This is a weaker version of one of the L+1 groups (terminology
from Davies' Life and Death) with a corner missing. A5 definitely
kills.
/Gunnar