Crush the Ko

  Difficulty: Intermediate   Keywords: Ko

Crushing the ko is a technique to avoid a ko fight. It will only work when the opponent is very low on liberties. Sometimes it's a form of connect-and-die and in other cases it's a form of oshi-tsubushi.

A ko can be crushed, if after opponent's ko capture one can give atari to the ko stones from the outside, and the opponent is suffering from a liberty problem so that he cannot connect his stones out.

Crushing the ko  

Here black wants to utilize a ko technique to force white to defend against the upcoming double atari. White W2 captures B1 without fighting the ko.

Six in the corner, 2 liberties  

This shape is alive because white can force black to a ko, which white then crushes.

Black's strongest attempt  
White can crush the ko.  

White can avoid the ko because she has enough outside liberties to play W6.

Crush the Ko last edited by PJTraill on July 8, 2020 - 19:01
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