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(No. 221: July 17, 2000)



Elementary level: Answer

Black 1 is the vital point.
If White 2, Black kills White with 3 to 5,
utilizing White's shortage of liberties.

Elementary level:Answer



Elementary level: Wrong Answer 1

Black 1 allows White to get a Ko with 2 to 4.

Elementary level: Wrong Answer 1



Elementary level: Wrong Answer 2

Black 1 allows White to live with 2 to 8.

Elementary level: Wrong Answer 2



Intermediate level: Answer

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

Elementary level: Answer



Intermediate level: Answer (Variation)

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

Intermediate level: Answer (Variation)



Intermediate level: Wrong Answer

Black 1 fails.
After White 2 to 4, Black is dead.

Intermediate level: Wrong Answer




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