Re: [gnugo-devel] intrusions

[bump]

Arend wrote:

> This patch tries to reduce the problem where gnugo underestimates the danger
> of intrusions such as this one:
> 
> endgame:840
>   A B C D E F G H J K L M N O P Q R S T
> 19 . . . . O . . . . . . . . . . . . . . 19
> 18 . . O O X X . . X X O . . . . . . . . 18
> 17 . . O X . . . X O O . O . X O . . . . 17
> 16 O . O X . . . X O + O . . X . O . . . 16
> 15 . O X . . . . X X X a , O . . . . . . 15
> 14 X O X . . . . . X O , . . . . O . . . 14
> 13 . X . . . . . . X O . . . . . . . . . 13
> 12 . . . . . . . X O O . . O . O . . O O 12
> 
> GNU Go as white doesn't bother to play at "a", basically because there are
> two influence blocks next to a, as if white could stop both continuations
> of black intrusions at the same time. The solutions works as discussed some
> time ago on the list:

How about thrash:10. Is this a similar problem?

(The test currently fails, and resembles the above position
except that in thrash:10 the K15 dragon is thrashing.)

Dan