(No. 109: May 25, 1998)
Elementary level: Answer
Black 1 is the vital point.
After White 2, Black 3 gets a Ko.
Elementary level: Reference Diagram
If White 2, Black lives with 3.
Elementary level: Wrong Answer 1
Black 1 allows White to play on the vital point 2.
After Black 3, White 4 kills Black in a five-point Nakate.
Elementary level: Wrong Answer 2
Black 1 also fails. White 2 creates
a five-point Nakate to kill Black.
Intermediate level: Answer
Black 1, sacrificing a stone, is crucial
to make White short of liberties. After Black 3,
White cannot do anything and dies.
Intermediate level: Variation
If White 2, Black 3 kills White.
Intermediate level: Wrong Answer
Black 1 allows White to get a Ko with 2.
All Rights Reserved, Copyright (C) 1998, Hitachi, Ltd.