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(No. 210: May 1, 2000)



Elementary level: Answer

Black 1 is the vital point. After White 2,
Black wins the capturing race with 3 to 5.

Elementary level:Answer



Elementary level: Wrong Answer 1

Black 1 lets White play on the vital point 2 and
get a Ko with White 4 after Black 3.
(The same shape as the preceding problem)

Elementary level: Wrong Answer1



Elementary level: Wrong Answer 2

Black 1 also allows White to play
on the vital point 2 and get a Ko.

Elementary level: Wrong Answer2



Elementary level: Wrong Answer 3

Black 1 allows White to play on the vital point 2
and loses the capturing race.

Elementary level: Wrong Answer3



Intermediate level: Answer

Black 1 is the vital point,
similar to the preceding problem.
If White 2, Black lives with 3 to 11.
If White 4 at 5, Black lives with 4.

Intermediate level: Answer

W6: connects underW2



Intermediate level: Anser (Variation)

If White 2, Black lives with 3 to 11.

Intermediate level: Variation

W6: connects underW4



Intermediate level: Wrong Answer

Black 1 first is wrong.
After White 2, Black has no way to live.
If Black 1 at 2, White kills Black with 1.

Intermediate level: Wrong Answer




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