Answers

(No. 261: Apr. 23, 2001)

Elementary level: Answer

Black 1 is the vital point.
After White 2, Black lives in a Seki with 3 to 5.
If White 2 at 5, Black lives with 2.

Elementary level: Wrong Answer

Black 1 is wrong.
After White 2 and 4, Black dies.

Intermediate level: Answer

Black 1 is the vital point.
After White 2, Black gets a Ko with 3 to 5.
If White 2 at 3, Black 2 kills White.

Intermediate level: Wrong Answer

Black 1 allows White the vital point 2 to get a Seki.