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(No. 239: Nov. 20, 2000)



Elementary level: Answer

Black 1 is the vital point.
After White 2, Black 3 gets a Ko.

Elementary level: Answer



Elementary level: Wrong Answer

Black 1 allows White the vital point 2
and loses the capturing race.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 and 3 are the vital points.
If White 4, Black lives by capturing
White's six stones with 5 to 7.

Intermediate level: Answer



Intermediate level: Answer (Variation)

If White 2, Black 3 to 5 kills White.

Intermediate level: Answer(Variation)



Intermediate level: Wrong Answer

Black 3 allows White to get a Ko with 4.

Intermediate level: Wrong Answer




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