XuanxuanQijingProblem49/Solution

[Diagram]

Main line (1)

B1 is the only way, but B3 is important to kill white.

[Diagram]

Main line (2)

White are planning oiotoshi.

[Diagram]

Main line (3)

White succeeded in oiotoshi with W16, but B17 is under the stones.

[Diagram]

Failure

B3 is a bad move, since w can make ko with W4.


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