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Re: [gnugo-devel] reading patch

From: Gunnar Farneback
Subject: Re: [gnugo-devel] reading patch
Date: Sat, 27 Oct 2001 08:53:11 +0200
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)

Trevor wrote:
> Um, on looking at this again, I do believe that it is correctly a
> ko, and not unconditional.
> To wit, in reading:154 - 
>  B G4, W F2, B H2, W H3, B H4, W J2, B H1, W J4
> A bit complicated, but none-the-less, it is a ko.

Agreed. To correctly detect this the ko depth needs to be increased to
11 (default 8).

Anyway, my patch does solve test case trevor:3 since it realizes the
danger of filling in at E3 on move 28. To detect this blunder the ko
distinction isn't important.

Btw, what my patch really does is to stop the tactical reading from
spending nodes and reading depth on the pointless atari at D5 and
similar meaningless moves.


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