Beginner Exercise 94 / Solution

Sub-page of BeginnerExercise94
[Diagram]

Ko

White's only chance of survival is starting ko by W1. It is atari to the Black string and force him to fight the ko.

(White can't wait for Black's approach, say a, to start the ko - Black will play at W1 instead)


Failure

[Diagram]

good when outside is alive

W1 would be the best move to kill Black if White's outside string were alive. Here it's a capturing race and White is far behind - Black has 8 liberties while White has only 3. (See Big eye liberties for reference).



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