ko

noun

(game of Go) A local shape to which the ko rule applies; a ko shape. / (game of Go) ko fight / (game of Go) a stone in a ko in atari, a ko stone

I bought a new book.

意味（1）

(game of Go) A local shape to which the ko rule applies; a ko shape.

Black gets an easy game by just filling the ko.

意味（2）

(game of Go) ko fight

Black wins the ko easily.

意味（3）

(game of Go) a stone in a ko in atari, a ko stone

Black recaptures the ko and white has to find another ko threat.