Beginner Exercise 106 / Solution

Life  

Black can live with , a or b. ( is the best because Black will have a ko threat here even after two successive White moves, which are possible in a ko fight.)

Black mistake  

threatens a snapback at . If Black connects, kills.

Ko  

So Black has no choice but to play threatening to kill the invader and live. After , Black has to find a ko threat to prevent White from direct capture.

Failure  

atari achieves nothing.