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Three By Four Solution
    Keywords: Problem

[Diagram]
Sacrifice for ko

Black throws in with B1 and B3, then connects with B5.


[Diagram]
Ko

White has no defense.


[Diagram]
Correct play (Japanese)

W4 descends. W6 is a throw-in for shortage of liberties.


[Diagram]
Seki

Black gets 2 points for the two prisoners.


[Diagram]
Correct play (Chinese)

Black wins by 4.

Note that by stone counting, Black wins by 3 points either way. In the second diagram Black needs one (false) eye for life.



This is a copy of the living page "Three By Four Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.