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(No. 243: Dec. 18, 2000)



Elementary level: Answer

Black 1 is the vital point of this capturing race.
If White 2, Black wins the race with 3 to 9.
If White 2 at 3, Black wins with 2.

Elementary level: Answer



Elementary level: Wrong Answer

Black 1 allows White the vital point 2 and
loses the capturing race.
If Black 3 at 4, White wins with 3.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 is crucial.
The result is a Ko with the moves to 9.

Intermediate level: Answer



Intermediate level: Wrong Answer

Black 1 is wrong and loses the capturing race.

Intermediate level: Wrong Answer




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