(No. 104: Apr. 20, 1998)
Elementary level: Answer
The combination of Black's moves 1 and 3 is
crucial to live. Then to the next diagram.
Elementary level: Answer (Continued 1)
Then if White 4, Black 5 sacrifices another stone.
After White 6, the next diagram.
Elementary level: Answer (Continued 2)
Black can live by 7 unconditionally.
Elementary level: Variation
If White 4 , Black lives with 5 and 7.
Elementary level: Wrong Answer 1
Black 1 fails. After White 2,
Black has no way to get two eyes.
Elementary level: Wrong Answer 2
Black 3 is wrong. After White 4,
Black has to compete the Ko to live.
Intermediate level: Answer
Black 1 is the vital point of the eye shape.
After White 2, Black 3 lets White take Black's
four stones. And then the next diagram.
Intermediate level: Answer (Continued)
Black 5 is an under-the-stone Tesuji and kills White.
Intermediate level: Wrong Answer
Black 1 allows White to live with 2.
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