Tic-Tac-Toe (XO)

Play Tic-Tac-Toe in Your Browser

This is the classic 3×3 grid game — also known as XO, Noughts and Crosses, or Xs and Os. Click or tap a square to place your mark, then take turns with the AI or a friend until someone lines up three in a row.

No download and no account. Open the board and play.

How to Play

• The board has nine empty squares in a 3×3 grid.
• X usually moves first, then players alternate, placing one mark per turn in any empty square.
• Line up three of your marks — across, down, or diagonally — and you win.
• If all nine squares fill with no line of three, the round ends in a draw.

That's the entire control scheme, on phone or desktop: tap an empty square to play there.

Rules Worth Knowing

• You can't skip a turn or place two marks in a row.
• A mark stays put once placed — nothing moves or gets removed.
• Any line of three ends the round immediately, diagonal included.
• A full board with no line is a draw, not a win for whoever moved last.

Simple Strategy

Tic-Tac-Toe is a solved game — with perfect play from both sides, every round is a draw. A short checklist is enough to stop losing:

• Win if you can. Two in a line with the third square open? Take it.
• Block if you must. If your opponent has two in a line, stop them before pushing your own attack.
• Open in the center when possible. It sits on four possible winning lines, more than any other square.
• Favor corners over edges. A corner sits on three winning lines versus an edge's two, and corners set up forks.
• Watch for forks. A fork is one move that creates two winning threats at once — your opponent can only block one.

If you go second: take the center if it's open, or a corner if the center is already taken.

FAQ

Is this the same as Noughts and Crosses?
Yes — Noughts and Crosses, Xs and Os, and XO are all names for the same 3×3 game played here.

Can I always win?
No. With perfect play from both sides, the game always ends in a draw. Wins come from an opponent's mistake — a missed block or an unseen fork.

Can I play against a friend?
Yes, take turns on the same board.

Do I need to download anything or sign in?
No. It runs directly in your browser — no app, no account.

What's the best opening move?
The center is the strongest square. If it's taken, a corner is the next best choice.