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How to play Tic-Tac-Toe
Tic-Tac-Toe is a short strategy game on a 3×3 board. You play X against a computer playing O. Each square can be used once, and the first line of three matching marks wins. A full board without a line is a draw.
- You are X and move first; the computer is O.
- Choose an empty square. Three of your marks horizontally, vertically or diagonally win.
- A full board with no line is a draw.
Tips for your next round
- Check for an immediate winning move before blocking the computer. If you cannot win now, block its line of two.
- A fork creates two winning threats at once. Watch for moves that let either player build one.
This is a single-player match against a local computer opponent; no online opponent or second player is needed.
Play free in your browser without an account. Your moves save in this browser during regular rounds. Sign in if you want to sync progress across devices. Very long rounds may stay in the current tab.