Under The Stones Problem 11 / Solution

Solution

[Diagram]

Solution

B1 threatens to make an eye so white reponds with W2. B3 secures the eyes on both side.

[Diagram]

Left eye

B4 at black+circle to recapture.

[Diagram]

Right eye

B4 at black+circle to recapture.



Failure

[Diagram]

Trying to secure the eye on the right directly with B1 or 'a' doesn't work; white can just destroy the eye on the left.

[Diagram]

Black plays at B1 or 'a' is met by W2. Next white have 'x' to destroy the potential eye on the right and 'y' to destroy the potential eye on the left like the sequence in the previous diagram.

[Diagram]

Before or after B3/W4 exhange, B5 is probably the strongiest resistance, but there's only a gote eye on the left. After W8, black is still stuck with the miai of 'x' and 'y'.

[Diagram]

W6 at white+circle.


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(OC) 2014 the Authors, published under the OpenContent License V1.0.
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