(No. 102: Apr. 6, 1998)
Elementary level: Answer
Black 1 is crucial to destroy White's eye shape.
After White 2, the next diagram.
Elementary level: Answer (Continued)
Black kills White with 3 and 5.
Elementary level: Wrong Answer
Black 1 is wrong. White lives with 2.
Intermediate level: Answer
Black 1 is crucial.
After White 2, Black 3 gets a Ko.
Intermediate level: Answer(Continued)
If White connects at 4,
Black gets a Ko with 5 and 7.
Intermediate level: Variation
If White 2, Black plays 3 and 5 to get a Ko.
Intermediate level: Wrong Answer
Black 1 fails. Black dies unconditionally
with White 2 and 4.
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