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(No. 235: Oct. 23, 2000)



Elementary level: Answer

Black 1 is the vital point.
White has to create a Ko with 2.

Elementary level: Answer



Elementary level: Wrong Answer

Black 1 allows White to live in a Seki with 2.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 is crucial.
If White 2, Black lives with 3 to 7 in a Seki.
If White 2 at 3, Black lives with 2.

Intermediate level: Answer



Intermediate level: Answer (Variation)

If White 2, Black lives with 3 to 7 in a Seki.

Intermediate level: Answer(Variation)



Intermediate level: Wrong Answer 1

Black 1 is wrong. White gets a Ko with 2 to 8.

Intermediate level: Wrong Answer1



Intermediate level: Wrong Answer 2

Black 1 is wrong. White plays 2 to 8. Black dies.

Intermediate level: Wrong Answer2




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