November 30, 2009
Black 1 is crucial.
If White 2 and 4, Black 5 lets White take at 6.
Then to the next diagram.
The order of Black 1 and 3 are crucial.
If White 4 and 6, Black 7 and 9 make White short of liberties.
White dies.
Black 1 first is wrong, and lets White live with 2 to 6.
