April 6, 2009
Black 1 is crucial.
If White 2, Black lives with 3.
If White 2 at 3, Black lives with 2.
Black 1 is wrong, and with White 2, Black dies.
If Black 3 at 4, White 3 kills Black.
Black 1 and 3 are crucial to kill White with the moves to 7.
