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Re: [gnugo-devel] attack_either patches analysis
From: |
Arend Bayer |
Subject: |
Re: [gnugo-devel] attack_either patches analysis |
Date: |
Mon, 21 Oct 2002 15:55:38 -0400 (EDT) |
Hi Evan,
thanks for analysing this in detail,...
Evan wrote:
> I finally got around to analyzing the delta on the attack_either patches.
>
> 13x13:42 Properly solved
> 13x13:40 Accidental
> trevora:220 unsure, maybe accidental
> nngs3:670 Properly solved
>
>
>
> 13x13:42
>
> The following gtp should make it clear what's going on (fails without the
> patch, passes with)
>
> loadsgf games/mertin13x13/katsunari-gnugo2.W+4.sgf 126
> black L4
> defend_both N7 K4
> #? [0]
>
...but I think this is actually wrong. After black L4, white can defend
both strings with N3. It would be good to find out why GNU Go doesn't see
this with your patch.
(I haven't looked at the other test cases.)
Arend