悪あく手しゅ

noun

bad move; poor play

Primarily used in board games like chess and shogi to describe a move that worsens one's position. Can also be used metaphorically for a poor decision in other contexts.

• その悪あく手しゅで形けい勢せいが一いっ気きに不ふ利りになった。

  That bad move suddenly turned the position unfavorable.

• 彼かれは終しゅう盤ばんで悪あく手しゅを指さして逆ぎゃく転てん負まけした。

  He made a bad move in the endgame and lost by a reversal.