[gnugo-devel] Strong non-linear behavior?

[SP LEE]

This problem comes from dniwog.tst:6

10 . O X + . . . . . + . . . . X + X . . 10
9 . O . X O . . . . . . . . . . . . . . 9
8 . . . X O X . . . . . . . . . . O . . 8
7 . . O X O O . . . . . . . . . . . . . 7
6 . O . X X . O . . . . . . . . . . . . 6
5 . O X . . X . . . . . . . . . . O O . 5
4 . X X O . . X O O O . . . . . O . X . 4
3 . X O X . O O X X O . . . O . O X . . 3
2 . X O X . O X X . . . . . . . . O . . 2
1 . . . . . . . . . . . . . . . . . . . 1
  A B C D E F G H J K L M N O P Q R S T

A semeai is going on at the lower side. White doesn't even need the tesuji 
at g1 (as mentioned in the test) to win the semeai, K2 is enough. When white 
has less liberty ,i.e. 3 instead of 4, the tesuji is necessary.

So I let black play first and then let gnugo play both black and white, the 
next sequence is played:
B:K2, W:L2, B:G1, W:J1, B:N9.

Thus, the black played excellent to save his group successfully, yet played 
tenuki at the last moment!
I also saw such behavior earlier in other games.

The moves to win the semeai were valued very high in the beginning stage, 
and then suddenly dropped to less than the real territorial value, about 
half of the beginning value. To my understanding, even at the final victory 
of the semeai, there is whole lot of strategy values in it. For instance, 
the out side opponent groups will be all weakened.

Anyone has some suggestion as which part of the program should I check?

SP Lee

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