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(No. 198: Feb. 7, 2000)



Elementary level: Answer

Black 1, sacrificing two stones, is the Tesuji to win.
After White 4, to the next diagram.

Elementary level:Answer



Elementary level: Answer (Continued)

Black wins the capturing race with 5 to 7.
If White 6 at 7, Black wins with 6.

Elementary level:Answer (Continued)



Elementary level: Wrong Answer

Black 1 allows White to get a Ko with 2 to 4.
(An approach move Ko)

Elementary level: Wrong Answer



Intermediate level: Answer

The combination of Black's moves 1 and 3 is crucial.
If White 4, Black 5 kills White.

Intermediate level: Answer



Intermediate level: Wrong Answer

Black 1 allows White to get a Ko with 2.

Intermediate level: Wrong Answer




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