Here is the position again: 1 2 3 4 5 6 7 8 9 A - - - - X - - - - B - - - O X - O O - C - - - O X - O X O D - X - O X X O X - E - O X O X O X - X F - - O - X O X X X G - - - - X O O O O H - - - X X X O - - J - - - - - O O - - X to play
It turns out that the right-hand side is a tough problem for O after X's toughest attack, which I think is C2! I have a best-play sequence: X C2 O B2 X F2 O D3 X E1 O G2 X E3 O H3 X E2 O F4 X B3 O A3 X C3 O A4 X J2 O C1 X G1 O H1 X A2 O A1 X J3 O G4 X H2 O F1 atari 1 2 3 4 5 6 7 8 9 A O - O O X - - - - B - O X O X - O O - C O X X O X - O X O D - X O O X X O X - E X X X O X O X - X F O X O O X O X X X G - O - O X O O O O H O X O X X X O - - J - X X - - O O - - But note an interesting thing here: O is winning on the left by just one tempo, and there is a Ko. Since O is also winning on the right by just one tempo, if he needs a ko to win the left, then he will lose the game. Is it possible that X wins here? _______________________________________________ Computer-go mailing list [email protected] http://dvandva.org/cgi-bin/mailman/listinfo/computer-go
