RTG Problem 44 / Attempts

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[Diagram]

Threshold

Dieter: Two things are clear to my low dan eyes: 1) if Black plays a he lives in ko 2) if White captures at b, Black is dead. Remains the question if Black can live without ko (aka "unconditionally") by playing b.

[Diagram]

Dead

This variation works for White: due to the circled weakness, Black's eyespace is almost filled with three stones, a dead shape.

[Diagram]

Var

B3 tries to lure White into a connect and die or capture three to make an eye but White deflects with W4, making miai of a and b.


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