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(No. 135: Nov. 23, 1998)



Elementary level: Answer

Black 1 is the vital point. If White 2,
Black kills White with 3 to 7.
If White 2 at 3, Black 2 kills White.





Elementary level: Wrong Answer 1

Black 1 allows White to live with 2.





Elementary level: Wrong Answer 2

Black 1 allows White to play on the vital point 2 and live.
(This is the same shape as the previous problem.)






Intermediate level: Answer

Black 1 is the vital point. If White 2,
Black creates a five point Nakate with 3 and 5.





Intermediate level: Variation

If White 2 and 4, Black kills White with 5 and 7.



7:connects at 2




Intermediate level: Wrong Answer 1

Black 1 first is wrong. White lives with 2 and 4.





Intermediate level: Wrong Answer 2

Black 1 fails. White plays on the vital point 2 and lives.






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