(No. 98: Mar. 9, 1998)
Elementary level: Answer
Black 1 , and then 3 is the correct order of moves.
After Black 7, White is dead.
If White 2 at 3, Black 2 kills White.
Elementary level: Wrong Answer 1
Black 1 first allows White to live with 2 to 6.
Elementary level: Wrong Answer 2
Black 1 also fails. White lives with 2.
Intermediate level: Answer
Black 1 is crucial to live. After White 2,
Black plays 3 and lives in Seki.
Intermediate level: Variation
If White 2, Black 3 is crucial.
After White takes the two Black stones at 4,
the next diagram.
Intermediate level: Variation (Continued)
Black retakes at 5. After White 6, Black 7 captures
the White stones and lives.
Intermediate level: Wrong Answer
Black 1 lets White to play 2 and get a Ko.
This is a ten-thousand-year Ko.
All Rights Reserved, Copyright (C) 1998, Hitachi, Ltd.