|OOOOXXXXX |XXXXOOOOX |OOXbOXXOX |OaX.OX.OX ---------- O can win by playing suicide at 'a'. X can prevent it by playing at 'b', but there exists a more complicated example based on the principle above where X can't prevent it even. This was found by Guus Rol a long time ago in his quest 'Is there life after death?' and published in the Dutch Go journal, but I can't remember the exact position.
There's a bunch of examples where suicide is a good move at http://www.goban.demon.co.uk/go/bestiary/rule_challenge.html These do not include the obvious O . O # O . . Upper left corner of board # # # # O . . O, to play, needs a ko threat . . . . O . . O O O O O . . . . . . . . . Nick -- Nick Wedd nick@xxxxxxxxxxxxxxxxx _______________________________________________ computer-go mailing list computer-go@xxxxxxxxxxxxxxxxx http://www.computer-go.org/mailman/listinfo/computer-go/