resolve the ko

  Difficulty: Beginner   Keywords: Ko

Chinese: 消劫 (xiao1 jie2)
Japanese: (コウを)解消 (kaishou)
Korean: -

There are basically two ways to resolve a ko (that is, to end a ko):

1. Connection

[Diagram]

ko

Black has played a ko-threat to which White decides not to respond :

[Diagram]

Connection

W1 connects and thereby resolves the ko, in short white connects the ko. (In Japanese, this shape is called 'Umebachi'; name of a flower-shaped Japanese heraldry)



2. Capture

[Diagram]

ko

If the marked stone is present, White can resolve the ko in a different way.

[Diagram]

Capture

It is now more profitable to capture the marked black stone to end the ko. This shows fundamental efficiency of ko; White has ignored atari and secured one point of territory and a likely eye at a by not connecting.


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