Answers

(No. 159: May 10, 1999)

Elementary level: Answer

Black 1 is the vital point. After White 2,
Black 3 creates a Five-point Nakate to kill White.

Elementary level: Wrong Answer

Black 1 allows White to play at the vital point 2 and get a Ko.

Intermediate level: Answer

Black 1 is crucial. If White 2, Black kills White with 3 and 5.
If White 2 at 5, Black 2 kills White.
If White 4 at 5, Black 4 kills White.

Intermediate level: Wrong Answer

Black 1 is wrong. After White 2,
Black only gets a Ko with the moves to 11.