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(No. 234: Oct. 16, 2000)



Elementary level: Answer

Black 1 is the vital point
of the center of this symmetric shape.
If White 2, Black lives in a Seki with the moves to 7.
If White 2 at 3, Black lives with 2.

Elementary level: Answer



Elementary level: Wrong Answer

Black 1 is wrong. After White 2 to 6, Black dies.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 to 3 is crucial. After Black 7,
White has to create a Ko with 8.

Intermediate level: Answer



Intermediate level: Wrong Answer

Black 1 first fails. White lives with 2 to 8.

Intermediate level: Wrong Answer




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