:: Igo Hatsuyôron 120 (2015)

The Further Evolution of Amateurs' Knowledge

(2011 - 2014)

White Captures with D @ Seven Liberties

:
Black has no other choice than to cut White's upper partial group apart.

:
Black has got two ko-threats.

A Black stone at (six liberties for White) would not have any effect.

:
Black has no valid ko-threats left.

:
In the problem, White would connect the ko, instead.

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