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(No. 136: Nov. 30, 1998)



Elementary level: Answer

Black 1 is the vital point to live.





Elementary level: Wrong Answer 1

Black 1 allows White to play on the vital point 2.
The result is a Ko with Black 3.





Elementary level: Wrong Answer 2

Black 1 also fails. After White 2, Black 3 only gets a Ko.





Elementary level: Wrong Answer 3

Black 1 is wrong. White 2 kills Black.






Intermediate level: Answer

Black 1 is crucial. If White 2, Black plays 3
and 5 to capture the White stones unconditionally.





Intermediate level: Wrong Answer 1

Black 1 allows White to get a Ko with 2 and 4.





Intermediate level: Wrong Answer 2

Black 1 is wrong. White plays 2 to 6
and the Black stones are captured.






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