Beginner Exercise 106 / Solution

Sub-page of BeginnerExercise106

Black first

[Diagram]

Life

Black can live with B1, a or b. (B1 is the best because Black will have a ko threat here even after two successive White moves, which are possible in a ko fight.)


White first

[Diagram]

Black mistake

W1 threatens a snapback at B2. If Black connects, W3 kills.

[Diagram]

Ko

So Black has no choice but to play B2 threatening to kill the invader and live. After W3, Black has to find a ko threat to prevent White from direct capture.

[Diagram]

Failure

W1 atari achieves nothing.



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