Tic Tac Toe OR Noughts and Crosses OR Xs And Os/“X'y O'sies”棋盤遊戲。
Tic Tac Teo (American English), noughts and crosses (Commonwealth English and British English), or Xs and Os/“X's O’sies” (Ireland), is a paper-and-pencil game for two players, X and O, who take turns marking the spaces in a 3×3 grid. The player who succeeds in placing three of their marks in a diagonal, horizontal, or vertical row is the winner.