Play Tic Tac Toe Online here in a large resizable window. This game is for two players and also called - noughts and crosses - in the UK, Australia and New Zealand.
The players, O and X, mark the spaces in a 3×3 grid. X begins first. If you succeed in placing three respective marks in a horizontal, vertical or diagonal row then you win.
Best play from both parties leads to a draw. If you have discovered an unbeatable strategy move on to a more complex game such as chess.