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(No. 183: Oct. 25, 1999)



Elementary level: Answer

Black 1 is crucial to kill White with the moves to 5.

Elementary level: Answer



Elementary level: Wrong Answer 1

Black 1 lets White get a Ko with the moves 2 to 8.

Elementary level: Wrong Answer1



Elementary level: Wrong Answer 2

Black 1 also fails. After White 2,
Black only gets a Ko with the moves to 7.

Elementary level: Wrong Answer2



Intermediate level: Answer

Black 1 is the vital point.
If White 2, Black 3 kills White.

Intermediate level: Answer



Intermediate level: Wrong Answer

Black 1 allows White to get a Ko with 2 to 6.

Intermediate level: Wrong Answer




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