GokyoShumyoSection3Problem19/Attempts

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solution?

xela: This part looks simple. The interesting bit (to me) is to prove that white can't kill, and that black doesn't have a better defence.

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variation

xela: Black can not avoid ko.

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failure

xela: If white tries too hard, black ends up living unconditionally. (If W3 is at a, it's ko again, right?)


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