Answers

(No. 284: Oct. 1, 2001)

Elementary level: Answer

Black 1 is the vital point.
After White 2, Black 3 gets a Ko.
If White 2 at 3, Black 2 kills White.

Elementary level: Wrong Answer

Black 1 allows White to live with 2.

Intermediate level: Answer

Black 1 is the vital point.
After White 2, Black gets a Ko with 3 and 5.

Elementary level: Reference Diagram

If White 4, Black kills White with 5 and 7.
White is short of liberties.

Intermediate level: Wrong Answer

Black 3 allows White to live with 4 and 6.