Xuanxuan Qijing Problem 338 / Solution

Solution

[Diagram]

Solution

W1 kills.

After W1, the black group has only 1 gote eye on the left and 1 gote eye on the right.

White will be able to destroy one of them.



Left eye

[Diagram]

(B2 at somewhere on the right)

White can make the left eye false.

[Diagram]

Black can't secure the left eye in sente.



Right eye

[Diagram]

(B2 is somewhere on the left)

The two black+circle are captured; White can destroy the right eye.

[Diagram]

Black can't secure the right eye in sente.




Failure

[Diagram]

(W1 not at B2)

B2 might not be the best move in every case, but B2 secures 2 eyes.


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