Classic rules
- One player is X, the other is O. X usually goes first.
- Take turns placing your mark in an empty square.
- Three of your marks in a row (across, down or diagonal) wins.
- If all nine squares fill with no line, it is a draw.
How never to lose
- If you can win this move, do it. If your opponent can win next move, block them.
- As X, start in a corner or the centre.
- As O, if X takes a corner, take the centre. If X takes the centre, take a corner.
- Look for a fork: a move that makes two threats at once. Your opponent can only block one.
With perfect play from both sides, every game is a draw.
Vanishing Tic Tac Toe
Each player can only have three marks on the board. When you place a fourth, your oldest mark disappears. Your faded mark is the one that goes next, so plan around it, and watch your opponent's faded mark too.
Ultimate Tic Tac Toe
- The board is nine small Tic Tac Toe boards inside one big one.
- The square you play in a small board sends your opponent to the matching small board. Play the top-right square and they must play in the top-right board.
- Win a small board to claim it. If you are sent to a board that is already won or full, you can play anywhere.
- Win three small boards in a row to win the game.
Ready to play?Tic Tac Toe is free on phone, tablet and computer.
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