Answers

(No. 157: Apr. 26, 1999)

Elementary level: Answer

Black 1 is the vital point.
If White 2, Black lives with 3.

Elementary level: Variation

If White 2, Black lives with 3 to 5.

Elementary level: Wrong Answer

Black 1 is wrong. After White 2,
Black cannot live because it is short of liberties.
(The same shape as the previous problem.)

Intermediate level: Answer

Black 1 is the vital point.
After White 2, Black kills White with 3 to 7.

Intermediate level: Variation

If White 2, Black kills White with 3 to 5.

Intermediate level: Wrong Answer

Black 1 fails. White lives with 2 to 6.