Under The Stones Problem 11 / Solution

Solution  

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

Left eye  

at to recapture.

Right eye  

at to recapture.

Failure

 

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

 

Black plays at or 'a' is met by . 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.

 

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

 

at .