Erik van der Werf wrote:
> On Jan 16, 2008 10:42 PM, Heikki Levanto <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
> > I can not think of any situation where filling a one-point eye
would be a
> > correct move (provided that it is a "real" eye and not a "false" one).
> >
> >
> > Can anyone come with concrete examples?
>
> Sure, for example with the following shape filling the eye makes a bulky
> five nakade in the corner
> _________
> |. # #
> |# #
>
>
> Under cgos rules you may in rare cases even have to fill eyes of
> pass-alive groups.
This reminds me that one of the games in the January KGS tournament
featured a case of moon-shine life because GNU Go by principle doesn't
play inside unconditional territory unless it needs to remove all dead
opponent stones, but even then only if there are dead stones in the
same eye. The game record can be found at
http://files.gokgs.com/games/2008/1/6/MonteGNU-break.sgf
This is the final position, in cleanup mode after disagreement:
A B C D E F G H J
9 . O . O O . . O . 9
8 . O O . O O . O O 8
7 O O + . O . + O O 7
6 O . O O O O . O O 6
5 . O O . + O . O . 5
4 O . O . . O O O O 4
3 O . + O . O X O X 3
2 O O . O O O X X . 2
1 . O O O X X X . X 1
A B C D E F G H J
Black has just captured ko at J3, white passed since it refused to
play inside any of its empty eyes, black of course passed too and the
game was counted as it stood with the black stones considered alive.
/Gunnar
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