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Tic-tac-toe AKA noughts and crosses, or Xs and Os, is now a game for your watch where it's you against the built in AI watch player. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is the winner. You can play as X (cross) or O (nought). Compete against the AI player at four difficulty levels. The app tracks game results and computes statistics so you can see how well you've done against your AI opponent.