Beginner Exercise 22 / Solution

Black first to kill  

The asymmetry in the setup indicates which side to start on. The only place where White could conceivably get any more eye space is along the side, so attack there first.

Black first to kill  

If White tries to solidify the eye at a, Black's hane leaves insufficient eye space.

Black first to kill  

If White tries to make more eye space, falsifies the eye. The circled point is also false.

Alternative.  

An alternative way of killing is at . If White plays at , Black will play at , so a and b are miai.

Failure.  

attacks in the wrong direction. After , there is no way to destroy the eye at the corner.