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(No. 178: Sep. 20, 1999)



Elementary level: Answer

Black 1 is crucial.
After White takes at 2, to the next diagram.

Elementary level: Answer



Elementary level: Answer (Continued)

After Black connects at 3, White may aim to capture
the Black stones in an Oiotoshi with 4 and 6.
But Black can take at 7. White dies.

Elementary level: Answer(Continued)



Elementary level: Wrong Answer

Black 1 is wrong. White captures
the four Black stones with 2 to 4 and lives.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 is crusial. The Black stones in the corner
connect to the outside and White dies.

Intermediate level: Answer



Intermediate level: Wrong Answer

Black 1 allows White to capture
the Black stones with 2 to 8 and live.

Intermediate level: Wrong Answer




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