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(No. 231: Sep. 25, 2000)



Elementary level: Answer

The combination of Black 1 and 3 is crucial.
After White 4, Black 5 creates a Ko.

Elementary level: Answer



Elementary level: Wrong Answer 1

Black 3 allows White to live with 4.

Elementary level: Wrong Answer 1



Elementary level: Wrong Answer 2

Black 1 lets White live with 2.

Elementary level: Wrong Answer2



Intermediate level: Answer

Black 1 is the vital point.
If White 2, Black lives with 3.
If White 2 at 3, Black lives with 2.

Elementary level: Answer



Intermediate level: Wrong Answer 1

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

Intermediate level: Wrong Answer1



Intermediate level: Wrong Answer 2

Black 1 is wrong.
After White 2 to 10, Black dies.

Intermediate level: Wrong Answer2



Intermediate level: Wrong Answer 3

Black 1 allows White the vital point 2.
Black cannot help creating a Ko with 3.

Intermediate level: Wrong Answer3




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