Answers

(No. 279: Aug. 27, 2001)

Elementary level: Answer

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

Elementary level: Wrong Answer

Black 1 allows White the vital point 2.
If Black 3, White 4 kills Black.
Black is short of liberties.

Intermediate level: Answer

Black 1 is the vital point.
After White 2, Black 3 kills White.
If White 4 at 7, Black 6 kills White.
Black can play Black 3 at 4 also, to kill White.

Intermediate level: Wrong Answer

Black 3 allows White to live with 4.