Re: [gnugo-devel] Extremely bad mistake

[SP LEE]

> I was sent a game where GNU Go lost with 26 handicap stones due to a
> repeated mistake. This is extremely bad. I would even say a
> showstopper for 3.4. (I haven't checked it but would guess the semeai
> code is at fault.)
> 
> /Gunnar
> 

I have edited the game to make the problem simpler. There is no ko and black 
has one more liberty. The reading code seems to be correct, telling that C19 
can be attacked by A16, but GNUGO still wants to attack the 2 stones at the 
middle, which is too small. I don't understand this situation. Please comment.

   A B C D E F G H J K L M N O P Q R S T
19 O . O X X . . . . . . . . . . . . . . 19
18 . O O O X X . . . . . . . . . . . . . 18
17 X O O X O . . . . X . . . . . X . . . 17
16 . X O X X X X . . X . . . . . X . . . 16
15 X X O X . O X . . . . . . . . . . . . 15
14 X X X O O O X . . . . . . . . . . . . 14
13 X . X X X O X X . X . . . . . . . . . 13
12 X . X X O O . O X . . . . . . . . . . 12
11 . X X O O O . O X . . . . . . . . . . 11     WHITE (O) has captured 5 stones
10 O O X X O O X X . X . . X . . X X . . 10     BLACK (X) has captured 5 stones
 9 . . O X O O O . X . . . X . . . . . . 9
 8 O O O O X X . . . . . . . . X . . . . 8
 7 . X . O . . O . . X . . . . X . . . . 7
 6 . X . . O . . X . . X O . . . . O . . 6
 5 . . . . . X X . . . . . . . . . . . . 5
 4 . . X X . . . . . X . . . . . X . . . 4
 3 . . . . . . . . . X . . . . . X . . . 3
 2 . . . . . . . . . . . . . . . . . . . 2



SP Lee

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