GokyoShumyoSection5Problem8/Solution

[Diagram]

Solution: ko

W6 @ B1 and B11 at a. Instead of W8, White may secure an eye in the corner...

[Diagram]

Variation: big ko

Black, with an additional liberty, must try to escape because eye vs no-eye capturing race is hopeless.

[Diagram]

Variation: White mistake

In this variation, W1 clamp is a mistake. The marked stone nets the White string.


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