Answers

(No. 253: Feb. 26, 2001)

Elementary level: Answer

Black 1 is crucial. After White 2, to the next diagram.

Elementary level: Answer (Continued)

Black plays 3. If White 4, Black lives with 5.

Elementary level: Wrong Answer

Black 1 allows White to get a Ko with 2.

Intermediate level: Answer

Black's moves 1 to 7 are all crucial to kill White.

Intermediate level: Wrong Answer

Black 5 lets White live with 6.
If Black 5 at 6, White lives with 5.