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Beginner Exercise 27 / Solution
Sub-page of BeginnerExercise27
Any a play is answered by either b; and vice versa. Thus Black secures eyes on the left group. So White attacks on the right. It looks like Black won't have enough eye space. But the cutting point (circled) proves fatal to White's plans.
Any other inside play, or a play at the squared point, is met by
If White fills, Black can still claim enough eye space this way. In this variation White can't play
Similarly here.
This is a copy of the living page "Beginner Exercise 27 / Solution" at Sensei's Library. ![]() |