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(No. 209: Apr. 24, 2000)



Elementary level: Answer

Black 1 is the vital point.
If White 2, Black gets a Ko with 3.

Elementary level:Answer



Elementary level: Answer (Variation)

If White 2, Black gets a Ko with 3.

Elementary level: Variation



Elementary level: Wrong Answer

Black 1 is wrong. White wins the capturing race with 2 to 6.

Elementary level: Wrong Answer



Intermediate level: Answer 1

Black 1 is crucial. After White 2,
Black retakes under 2. White dies.

Intermediate level: Answer1

B2: retakes under W2



Intermediate level: Answer 2

Black 1 looks like a strange shape, but this is also correct.
After White 2, Black retakes under 2. White dies.

Intermediate level: Answer2



Intermediate level: Wrong Answer

Black 1 is wrong, and allows White to get a Ko with 2 to 6.

Intermediate level: Wrong Answer

B5: retakes under W4
W6: makes an eye under B5



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