(No. 128: Oct. 5, 1998)
Elementary level: Answer
Black 1 and 3 are crucial to live.
Elementary level: Wrong Answer
Black 1 is wrong. After White 2, Black has no way to live.
Intermediate level: Answer
Black 1 is the vital point. If White 2 at 3,
Black 2 captures the white stones and lives.
After White 2, Black lives with 3 to 11.
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Intermediate level: Wrong Answer
Black 1 is wrong. After White 2,
there is no way that Black can live.
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