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(No. 197: Jan. 31, 2000)



Elementary level: Answer

Black 1 is crucial. If White 2,
Black plays 3 to 7 to win the capturing race.

Elementary level: Answer



Elementary level: Variation

If White 4, Black wins with 5 to 7.

Elementary level: Variation



Elementary level: Wrong Answer

Black 1 is wrong. White captures
the Black stones with 2 to 4.

Elementary level: Wrong Answer



Intermediate level: Answer

The combination of Black's moves 1 and 3 is crucial.
After Black 7, White dies because it is short of liberties.

Intermediate level: Answer



Intermediate level: Wrong Answer 1

Black 1 allows White to get a Ko with the moves to 6.

Intermediate level: Wrong Answer 1



Intermediate level: Wrong Answer 2

Black 1 lets White live with 2.

Intermediate level: Wrong Answer 2




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