Gokyo Shumyo, Section 5, Problem 8 / Attempts

[Diagram]

Black to play and live by oiotoshi. The solution is a ko.

[Diagram]

Ko.

W6 @ B1 Dieter: Two variations. a) Black plays B7 too soon. Then White can give up the border stone and Black has too few liberties b) Black sacrifices another stone at B4. Then she loses the capturing race with one move.

xela: By "the border stone", you mean white+circle in the first diagram? Dieter: indeed.


[Diagram]

Variation?

[Diagram]

Variation?


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