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(No. 195: Jan. 17, 2000)



Elementary level: Answer

Black 1 is crucial. White 2 is also crucial,
and it results in a Ko.

Elementary level: Answer



Elementary level: Wrong Answer 1

Black 1 is wrong. White 2 creates
a five-point Nakate, and Black dies.

Elementary level: Wrong Answer1



Elementary level: Wrong Answer 2

Black 1 is also wrong. White cuts at 2, and
Black cannot do anything more,
because it is short of liberties. Black dies.

Elementary level: Wrong Answer2



Intermediate level: Answer

Black 1 is the vital point. If White 2,
Black plays 3 to 7 and gets a Ko.

Intermediate level: Answer



Intermediate level: Wrong Answer

Black 1 lets White play on the vital point 2.
Black loses the capturing race.

Intermediate level: Wrong Answer




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