XuanxuanQijingProblem131/Attempts

[Diagram]

W1 threat to the upper side

[Diagram]

W1 threat to the lower side

B4 is the strongest resistance imo - other answers let white make a sente eye or don't work (please prove me wrong if I again missed a main variation). White can than make a second one in gote at a.

[Diagram]

W1 threat to the lower side

As Black can't defend both sides simultaneously W1 is the solution.


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