(No. 205: Mar. 27, 2000)
Elementary level: Answer
Black 1 is crucial. If White 2,
Black wins the capturing race with 3 to 7.
Elementary level: Wrong Answer 1
Black 1 is wrong. With White 2, Black loses the race.
Elementary level: Wrong Answer 2
Black 1 is wrong, too. White wins the race with 2 to 6.
Intermediate level: Answer
Black 1, 3 to 5 is the Tesuji of this capturing race.
After White 8, to the next diagram.
Intermediate level: Answer (Continued)
Black wins the capturing race with 9 to 11.
Intermediate level: Wrong Answer
Black 3 is wrong. Black gets no
more than a Ko with the moves to 11.