Answers

(No. 259: Apr. 9, 2001)

Elementary level: Answer

Black 1 and 3 is crucial.
If White 4, Black kills White with 5 to 7.
If White 4 at 7, Black 4 kills White.

Elementary level: Wrong Answer

If Black plays 1 and 3 first, White gets a Ko with 4.

Intermediate level: Answer

Black 1 is crucial.
If White 2, Black lives with 3 to 7.

Intermediate level: Answer (Variation)

If White 2, Black lives with 3 to 9.

Intermediate level: Wrong Answer

Black 1 is wrong. White kills Black with 2 to 6.