Answers
(No. 280: Sep. 3, 2001)
Black 1 is the vital point.
If White 2, Black kills White with 3 and 5.
Elementary level: Wrong Answer
Black 1 allows White the vital point 2 to live.
Black 1 is crucial.
After White 2, Black gets a Ko with 3.
Intermediate level: Wrong Answer
Black 1 is wrong.
After White 2, Black dies unconditionally.
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