GokyoShumyoSection5Problem5/Attempts

[Diagram]

first attempt

[Diagram]

refutation

W9 at W1

[Diagram]

continuation

Dieter

[Diagram]

second attempt

xela: Black can play a or b next. If black a, white b gives the position in "first attempt" at the top of this page. If black b, white a wins without ko:

[Diagram]

continuation

W4 at W2; B5 at white+circle.

[Diagram]

continuation (B3 at black+circle)

Herman Hiddema

[Diagram]

White takes ko first

Bill: If B3 @ a, W4 fills the ko, and it's seki. (b and c are miai.) Note that b is a local ko threat for White.


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