Answers

(No. 187: Nov. 22, 1999)

Elementary level: Answer

Cutting at Black 1 is the vital point.
If White 2, Black 3 kills White.
White cannot do anything further
because it is short of liberties.
If White 2 at 3, Black 2 kills White.

Elementary level: Wrong Answer

Black 1 allows White to get a Ko with 2.

Intermediate level: Answer

Black 1 and 3 are crucial to win the capturing race.

Intermediate level: Wrong Answer 1

Black 1 is wrong. After White 2 and 4,
Black has to create a Ko with 5 and 7.

Intermediate level: Wrong Answer 2

Black 3 is wrong. After White 4 and 6,
Black loses the capturing race.
Black can get a Ko by playing 5 at 6.