XXX — Tic-Tac-Toe

Tic-Tac-Toe online: rules, strategy and game modes

Tic-tac-toe (called noughts and crosses in the UK and parts of the Commonwealth) is played on a 3×3 grid: players take turns marking a square and the first to get three in a row wins. On XXX you can play it online, free, with no sign-up against someone from anywhere, with a friend, or against the computer.

How to never lose

• If you go first, take a corner or the centre: they sit on the most winning lines.
• If your opponent opens in a corner, answer in the centre; if they open in the centre, take a corner.
• Always check whether your opponent has two in a row and block the third square.
• Look for a fork: a move that creates two threats at once, which can't both be blocked.
• With perfect play from both sides, the classic game is always a draw, which is why XXX adds deeper modes.

The four modes

• Classic: the 3×3 you know.
• Vanishing pieces: only three pieces each; placing a fourth removes your oldest. No draws, ever.
• Big board: 5×5, get four in a row.
• Ultimate: a game inside a game; where you play decides which board your opponent must play in.

Frequently asked questions

Do I need an account?

No. Pick a nickname and play. Your level and settings are stored only in your browser.

How do I play with a friend?

Tap "Invite a friend", copy the link and send it. They join the same room whatever their language or country.

Can I play against the computer?

Yes, on easy, medium or hard.

Does it work on mobile?

Yes, it is built for touch screens and needs no install.