Xuanxuan Qijing Problem 7 / Solution

There's one eye in the corner already, so the problem is basically how to destroy the potential eye in the middle.

[Diagram]

1 is the key point here. The obvious defense would be 'a' and 'b', as black can play 'a' next and capture the three stones.

[Diagram]

Line 'a'

After white 2, there are two potential eyes at around 'a' and 'b'. Since 'c' and 'd' are miai to destroy the eye at 'a', we start with the one on the right.

[Diagram]

Line 'a' cont.

After black 1, 'a' and 'b' are miai to destroy the eye on the right. 'c' and 'd' are miai to destroy the eye on the left.

[Diagram]

Line 'b'

If white plays 2 here,black 3 is nice. It should be obvious that white can't make the second eye. If white plays 'a', black has the throw in at 'b'.


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