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(No. 228: Sep. 4, 2000)



Elementary level: Answer

Black 1, sacrificing a stone,
makes White short of liberties.
After Black 5,
there is no way for White to live.

Elementary level: Answer



Elementary level: Wrong Answer

Black 1 first lets
White live with 2 to 6.

Elementary level: Wrong Answer



Intermediate level: Answer

Black 1 is the same kind of Tesuji
as the preceding problem.
After White 2, Black gets a Ko with 3.

Elementary level: Answer




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