Re: [gnugo-devel] Cosmic GnuGo + bug ?

[Gunnar Farneback]

St?phane wrote:
> Note, however, than I have encountered a very strange bug at
> the end of the game attached game (Black is my modified version
> of 3.3.18, White is the default 3.3.18. level 5 vs. level 5)
> 
> The strange behaviour is the following one : Black manages to
> build a  winning, huge territory, but fails to kill the late white
> invasion. So far, so good.
> However, as a result, both programs pass before the end of the game !

As far as I can see, black manages to kill the main part of the white
invasion. At the end of the game the position is

   A B C D E F G H J K L M N O P Q R S T
19 . . . . . . . . . . . . O X X X . . . 19
18 . . . . . . . . . . . . O O O X X . . 18
17 . . . O O O . . O O O O . . O O X . . 17
16 . . O O X O O O O X O X O O X X O . . 16
15 . . O X X O X X X X X X X X . . X . . 15
14 . . O X X X . . . . . . . . . X . . . 14
13 . . O O X . . . . . . . . . . . . . . 13
12 . . . O X . . . . . O X . . . . X . . 12
11 . . . O X . . . . O . X . . . . . . . 11
10 . . O X . . . O . O X . X X . + . . . 10
 9 . . O X X . X O . O . O X O X X X X . 9
 8 . O X X . X X X O O X . . O X O O X X 8
 7 . . O X X O X . X X O . . X O . O O X 7
 6 . . O O O O O X O X O . . X O . . . O 6
 5 . . . O . O O X . X . . . X X O . O . 5
 4 . . . O . O O O X + X . X X O O . . . 4
 3 . . . O O X O X X . O X X X O . O . . 3
 2 . . . . O X X X X O . O . X X O . . . 2
 1 . . . . O O O O X . . . . X O O . . . 1
   A B C D E F G H J K L M N O P Q R S T

All O stones in the center of the board, including K11, are considered
dead by the engine and as far as I can tell this is correct. Since
both players agree that the stones are dead I can see no problem with
passing in this position.

/Gunnar