GokyoShumyoSection4Problem7/Attempts

LukeNine45: Did I miss anything?

erislover: Another variation to consider is white W2 at B7.

[Diagram]

Black to win the capturing race

[Diagram]

If white plays at W4 first...


MrTenuki Hmmm, W2 at B7...

[Diagram]

Black to win the capturing race

This would lead to a ko with black taking first. But black has a better move.

[Diagram]

Black to win the capturing race

W4 can't be played at a or b due to a shortage of liberties. So white has no choice but to approach from the top, and black wins the capturing race.


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