Petr Baudis wrote: >>>> 1 2 3 4 5 6 7 8 9 >>>> A - - O - - - - - - >>>> B X X X O X - - - - >>>> C O O X O X X - - - >>>> D O - O X X - X X - >>>> E - O O O X X O X X >>>> F - X O - X O O O X >>>> G - X O - X O O - O >>>> H O X O - X X O O - >>>> J - - - O X - X O - >>>> O to play > > I don't see how J3 works, black still can win the ko, can't he? > > J3 - H4 - G4 - F4 - J6
Here's your mistake, don't exchange G4-F4. To begin with white can save G4 for use as a ko threat but in this case that is also wrong. By keeping G4 and F4 open white has enough outer liberties so that black only gets a single ko threat in the lower left (E1). > now they play the ko: > H9 - J9 - J5 black takes > A4 - A5 - J6 white takes > F1 - J2 - J5 black takes > A2 - A1 - J6 white takes > E1 - G1 - J5 black takes > and white has no threats. > > I admit I didn't see F1 immediately and went at E1 right away, maybe > that's the hard part for the bots? With two outer liberties F1 can be ignored. /Gunnar _______________________________________________ computer-go mailing list [email protected] http://www.computer-go.org/mailman/listinfo/computer-go/
