Brian,

this is interesting.

The sequence is as interesting as the superko, really, because it's the sort of strange sequence that would only occur to monte carlo programs. When black plays B9, a human white player would answer H4. This gives the highest win. If he's feeling obliging, he might answer A5. What he certainly would never play is A9. As for black, looks like he should resign instead of B9. I'm very curious what black thought the win rate was before B9....

Christian

On 04/10/2009 22:21, Brian Sheppard wrote:
   1 2 3 4 5 6 7 8 9
A O O O X - X X O -
B - O O X X O O - -
C O - O X X - O O O
D - O X X O O O X O
E O O O O X X O X X
F X O O X X X X X -
G X X O O X O X - X
H - X X - O O O X -
J X X - O - X X - X

X: B9 (hole-of-three)
O: A9 (atari)
X: B8 (capture)
O: A8 (atari)
X: A9 (capture)
O: A8 (capture)

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