[gnugo-devel] territory values

[Gunnar Farnebäck]

In score2:50 the position is

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

This looks easy to score but the play out score options (aftermath and
finish) gets it wrong because they want black to play at N16 before
passing. The reason for playing N16 is that it's thought to increase
the territory by 2 points, which in turn is caused by the influence
territory values being evaluated to about 0.8 in an area around N13.

Should we try to modify the territory evaluation so that all of the
upper right quadrant is considered fully black territory in general or
should I make a scoring specific fix?

/Gunnar