GokyoShumyoSection3Problem80/Solution

[Diagram]

White to make ko

If B6 captures, W7 at B6 starts ko immediately.

[Diagram]

Continued 1

B6 is necessary to prevent another eye. B10 makes a flower six. W11 captures at a.

[Diagram]

Continued 2

W6 at W2 and ko starts.

[Diagram]

Variation

Black may choose B2 connect here (instead of block at B6). After the forced sequence....

[Diagram]

Eternal Life

W1! leads to a repeating shape called eternal life (W3 recapture at white+circle, B4 at black+circle) . The game ends with no result under Japanese rules.


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