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Re: [gnugo-devel] attack1() patch
From: |
Evan Berggren Daniel |
Subject: |
Re: [gnugo-devel] attack1() patch |
Date: |
Sat, 23 Nov 2002 01:05:58 -0500 (EST) |
On Fri, 22 Nov 2002, Evan Berggren Daniel wrote:
> This patch solves reading:55. In the testcase, the defender can make a
> group with one eye and one liberty in ko. The reading code does not
> understand that the defender cannot win the ko no matter what. This patch
> makes attack1() count such cases as wins by checking whether the defender,
> given infinite moves, could actually defend. (Defender needs more than
> one chance for cases like reading:132 where he must win the ko more than
> once, but can win eventually.) Of course, this has a small performance
> penalty (reading nodes in reading.tst from 97435 to 97799).
>
> I am running a full regression suite now, and will post results if more
> than reading:55 changes.
So far one fail in ld_owl:182 (a tripod group ko problem). It seems
likely to be real. I'll see if I can get something better worked
together, but the patch is probably a bad idea as it stands.
Thanks,
Evan Daniel