Black can kill by playing 1.
Black can kill by playing at . White cannot play at a because of shortage of liberties. Hence the white group is left with one eye.
Note that and cause the point at b to become a false eye.
Failure 1.
The push at fails. makes the second eye.
Failure 2.
The placement at is not good for killing the white group.
Lonestar, unkx80.
Referenced byBeginnerExercise66