Tic-Tac-Toe
X vs O. You vs a clever AI.
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About Tic-Tac-Toe
Tic-Tac-Toe (noughts and crosses) is the world's most famous pen-and-paper game, now playable free in your browser. Take on a computer opponent with three difficulty levels — from a casual rookie to an unbeatable strategist powered by the minimax algorithm — or pass the device and play a friend in two-player mode. Line up three X's or O's in a row, column, or diagonal to win. Quick rounds, running score tally, and that eternal question: can you outsmart a perfect player? Games run instantly in your browser on any phone, tablet or desktop with nothing to install. Start on easy to learn the patterns, then work up to hard mode — forcing a draw against the perfect AI is a genuine victory. Prefer a human rival? Try Tic-Tac-Toe Online and play a friend live.
How to play Tic-Tac-Toe
- 1You play X; tap any empty square to make your move.
- 2The AI (or your friend in 2-player mode) places O.
- 3Get three of your marks in a row — horizontally, vertically, or diagonally — to win.
- 4If all nine squares fill with no winner, it's a draw.
- 5Score is tallied across rounds — play a best-of series!
Tips & strategy
- Take the center first — it's part of 4 possible winning lines.
- Corners beat edges: each corner joins 3 winning lines, edges only 2.
- Create a 'fork' — two winning threats at once — and you can't be stopped.
- Against Impossible difficulty, perfect play always ends in a draw. Prove it!
Frequently asked questions
Can I beat the Impossible AI?
No — it plays mathematically perfect moves using minimax. The best possible result is a draw, which is itself a win for you!
Can two players play on one device?
Yes — switch to 2-player mode and take turns on the same screen.
Who goes first in Tic-Tac-Toe?
X always moves first. On FunNudge you play X by default, so you get the first-move advantage.