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(No. 241: Dec. 4, 2000)



Elementary level: Answer

Black 1 is the vital point to capture
the three White stones and live.

Elementary level: Answer



Elementary level: Answer (Variation)

If White 2, Black 3 to 5 captures the White stones to live.

Elementary level: Variation

W4: connects underW2



Elementary level: Wrong Answer

Black 1 allows White the vital point 2.
Black has nothing further to do.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 is crucial to get a Ko.

Intermediate level: Answer



Intermediate level: Reference Diagram

If White 2, Black connects at 3.
After Black 7, White cannot help creating a Ko with 8.

Intermediate level: Reference Diagram



Intermediate level: Wrong Answer

Black 1 fails. After White 2 to 4,
there is no way that Black can live.

Intermediate level: Wrong Answer




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