(No. 112: June 15, 1998)
Elementary level: Answer
Black 1 is the vital point. After White 2,
Black attacks from outside with 3, and
kills White with the moves to 7.
Elementary level: Wrong Answer
Attacking from outside, Black 1 lets White live
with the moves to 6. If Black 1 at 2, White lives with 1.
Intermediate level: Answer
Black 1 is crucial. If White 2, Black 3 kills White.
After White 4 takes the two Black stones, Black retakes it at the right of 4.
White cannot make an eye here.
|| right of
Intermediate level: Wrong Answer 1
Black 1 is wrong. White plays 2 to 6,
and then to the next diagram.
Intermediate level: Wrong Answer 1 (Continued)
The result is turned into a Ko with the moves to 9.
Intermediate level: Wrong Answer 2
Black 1 also fails. White can get a Ko
with the moves 2 to 8.
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