コウ材ざい

noun

ko threat

A move in the game of Go that creates a threat elsewhere on the board, forcing the opponent to respond and allowing the player to retake the ko.

See also: 劫立て · 劫

• コウ材ざいがなければ、コウに勝かてない。

  Without a ko threat, you cannot win the ko.

• 彼かれはコウ材ざいを打うってから、すぐにコウを取とり返かえした。

  He played a ko threat and then immediately took the ko back.