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October 1996's Go Answer of the Month

Dia 1 - Black to play and kill.

From another Japanese problem book which I am unable to read!
(Dias 1, 4 & 5 are from the book, 2 & 3 are mine.)

Dia 2 - An incorrect black 1.

This black 1 is lets White live with two eyes.

Dia 3 - Another incorrect black 1.

In this case it is a ko, with Black having to capture 12 otherwise White lives easily. White has some local ko threats for example diagonally above/left of 4.

Dia 4 - The right attack.

White ends up with just one eye.

Dia 5 - Alternative white 2 fails.

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