Tic-tac-toe (or “Noughts and Crosses”) is a game simple enough to implement in any computer system: indeed it’s often used in beginner’s programming courses. A more challenging project ...

Tic Tactics is a strategy game designed for those who want more than just a classic match of Tic Tac Toe. Though there are some additions, the core gameplay stays true to the original Tic Tac Toe ...

So tic-tac-toe falls into the sad category of solved games. Challenging someone to recite the alphabet backwards would be more unpredictable.