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(No. 162: May 31, 1999)



Elementary level: Answer

Black 1 is the vital point to get a Ko.

Elementary level: Answer



Elementary level: Wrong Answer

Black 1 allows White to play on the vital point 4
and loses the capturing race.

Elementary level: Wrong Answer



Intermediate level: Answer

The series of Black's moves 1 to 9 is the Tesuji.
After White 12, to the next diagram.

Intermediate level: Answer



Intermediate level: Answer(continued)

Black wins the capturing race, with 13 and 15.

Intermediate level: Answer(continued)



Intermediate level: Variation

If White 2, Black wins the race with 3 to 5.
If White 2 at 5, Black wins with 2.

Intermediate level: Variation



Intermediate level: Wrong Answer

Black 5 allows White to get a Ko with 6 and 8.

Intermediate level: Wrong Answer



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