TicTacToe

Tic-tac-toe (American English), noughts and crosses (British English) or Xs and Os, 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 horizontal, vertical, or diagonal row wins the game. Players soon discover that the best play from both parties leads to a draw. Hence, tic-tac-toe is most often played by young children.