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(No. 113: June 22, 1998)




Elementary level: Answer

Black 1 is the vital point. After White 2,
Black 3 creates a four-point Nakate and kills White.





Elementary level: Variation

If White 2, Black 3 creates a five-point Nakate. White is dead.





Elementary level: Wrong Answer 1

Black 1 allows White to play at the vital point 2 and get a Seki.
If Black tries to kill White with 3, Black loses the capturing race.





Elementary level: Wrong Answer 2

Black 1 also fails. White 2 is the vital point.
Black cannot get more than a Seki with 3.






Intermediate level: Answer

Black 1 is crucial, and after White 2 Black 3 is
the vital point. After White 8, the next diagram.





Intermediate level: Answer (Continued)

Black plays 9 and lives.





Intermediate level: Variation 1

If White 4, Black 5 gets a Seki.





Intermediate level: Variation 2

If White 2, Black gets a Seki with 3 to 7.
If White 2 at 5, Black lives with 3.





Intermediate level: Wrong Answer

Black 1 is wrong. White kills Black with 2 to 8.






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