Re: [gnugo-devel] territory values

[Arend Bayer]

On Thu, 6 Jan 2005,  wrote:

> 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?

Hmm. I think N13 should be considered safe territory even before
scoring. So I guess fixing the territory evaluation would be better, if
possible? 

OTOH, the fate of W R17 or W R16 isn't _that_ clear...

Arend