Another month, another seki: 1 2 3 4 5 6 7 8 9 A - - - X - O O X - B - - O O O O X X - C O O - O X X O O - D O X O X X - X O X E - X X X X X X X X F X - X - - O X O O G - X - X X O O O - H - - - X O - - O - J - - - X O O O - - O to play.
Pebbles rated this position as a 93% win, with over 10000 trials. It seemed that way to me, too. O fills C3, and then gets either F5 or E1 to make 37 points and win by 0.5 with komi. The actual variation: C3, A2, A3, E1, F5, B1 and now O cannot win. 1 2 3 4 5 6 7 8 9 A - X O X - O O X - B X - O O O O X X - C O O O O X X O O - D O X O X X - X O X E X X X X X X X X X F X - X - O O X O O G - X - X X O O O - H - - - X O - - O - J - - - X O O O - - O to play. The upper left is seki. I didn't see that coming. If O responds to A2 with B2 then we get a different seki: 1 2 3 4 5 6 7 8 9 A - X X X - O O X - B - O O O O O X X - C O O O O X X O O - D O X O X X - X O X E X X X X X X X X X F X - X - O O X O O G - X - X X O O O - H - - - X O - - O - J - - - X O O O - - With enough search effort, Pebbles will see this as a loss for O. It takes about 60000 trials for the score to drop below 50%. Seeing the loss is delayed by forcing exchanges such as A9/B9. Best, Brian _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
