Biggest Known Eye Space for which there is a Nakade / Solution 2

[Diagram]

Throw-in (B2 takes 16)



[Diagram]

White kills

a and b being miai.

Robert Pauli: The original solution plays B8 at a and, of course, W9 at b, but this one creates more ko threats (if kept in reserve, of course). Not the topic, but anyway.


Robert Pauli: Here's why W3 (above) shouldn't capture the stone (side topic):

[Diagram]

White slips: ko



[Diagram]

6 internal threats

Ko fights after each white move skipped. Pretend that Black loses each and has no escape.

But even if Black had no hope to win the ko, a ko wouldn't be in the "rules": after capture, the eye must be unconditionally undividable.

[Diagram]

White can't avoid ko

Black either lives with a or b.



[Diagram]

Nice variant, but only seki




This is a copy of the living page "Biggest Known Eye Space for which there is a Nakade / Solution 2" at Sensei's Library.
(OC) 2005 the Authors, published under the OpenContent License V1.0.
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