Tic-Tac-Toe online: beat the computer (if you can)
Three in a row. Try the unbeatable computer or play a friend.
The world's quickest strategy game. Take turns marking squares; first to three in a row wins. Our Unbeatable mode never loses — the best you can do is draw. Easy and Smart modes are friendlier for kids.
How to play Tic-Tac-Toe
- You're X. Tap a square to place your mark.
- The computer (or your friend) plays O.
- Three in a row — across, down or diagonal — wins.
- Starting player alternates each round.
Tips and strategy
- Take the center if it's free; corners are next best.
- If your opponent takes a corner, you should take the center.
- Fork: create two winning threats at once.
- Against Unbeatable, a draw is a perfect result.
About the game
Three-in-a-row games are among the oldest known games, with grids scratched into ancient surfaces in many cultures. With perfect play from both sides, every game ends in a draw.
Frequently asked questions
Can the computer really never lose?
On Unbeatable it plays perfectly using a complete game search, so no.
Which mode is best for kids?
Easy plays random moves, so young players can win and learn.
Who starts?
The first move alternates each round between you and the computer.
Can two people play?
Yes — choose Friend (same device).
