空あき三さん角かく

noun

empty triangle; L-shaped formation of three stones

In Go, a specific bad shape where three stones form an L with an empty point at the corner, considered inefficient.

• 空あき三さん角かくは悪あく形けいの代だい表ひょう例れいだ。

  The empty triangle is a classic example of bad shape.

• 初しょ心しん者しゃはよく空あき三さん角かくを作つくってしまう。

  Beginners often end up making an empty triangle.