Tic-Tac-Toe
Play Tic-Tac-Toe against the computer AI or with a friend.
About Tic-Tac-Toe
Classic 3 by 3 rules
The board has nine cells. X moves first, O follows, and the first player to make a full row, column, or diagonal wins. Two-player mode lets both players take turns on the same screen.
Browser-only minimax opponent
Against the computer, O picks its move with a local minimax search. The game does not create accounts, save score history, or connect you to online multiplayer; resetting simply clears the current local board.
FAQ
Common questions and answers about this topic.
Can I play tic-tac-toe online here?
Yes. The game uses the classic 3 x 3 board: X moves first, O follows, and the first player to connect three cells in a row, column, or diagonal wins.
Is there a computer opponent?
Yes. CPU mode lets you play against O, which chooses moves with a local minimax search in your browser. No download or account is required.
Can two people play on the same device?
Yes. Switch to Two Players and both players can take turns as X and O on the same board.
Does the game save scores or connect to online multiplayer?
No. The game runs in your browser, does not create an account, and does not save score history or connect to online multiplayer. Resetting clears the current local board.