Ultimate Tic-Tac-ToeFree, no sign-up
Play Ultimate Tic-Tac-Toe, nine games of tic-tac-toe at once, against the computer. You are X and always move first. The computer's play changes at midnight Japan time (UTC+9); on the same day and level it always answers the same moves the same way.
🏁 Game over
Only wins against today's CPU can go on the leaderboard (random practice, losses and draws aren't recorded).
FAQ
What is Ultimate Tic-Tac-Toe?
It's tic-tac-toe made of tic-tac-toe: nine small boards arranged in a 3×3 grid. Get three in a row on a small board to win that board, and win three small boards in a row — across, down or diagonally — to win the game.
Which board do I play in?
The square your opponent just played decides your board. If they played the top-right square of a small board, you must play in the top-right board. If that board is already won or full, you may play in any board that is still open. Playable boards are highlighted and open squares show a dot.
When is it a draw?
If no squares are left and neither side has three small boards in a row, the game is a draw. A small board that fills up with no three in a row counts for nobody. (Some people break ties by counting boards won; this game doesn't.) Draws and losses aren't recorded.
Any tips?
Every move also chooses where your opponent plays next. Try not to send them to a board where they can complete three in a row, or to a finished board, which lets them play anywhere. The center board is part of the most lines on the big grid, so it's worth winning.
How strong is the computer, and how is the leaderboard ranked?
Easy only looks at its own next move and adds plenty of randomness. Normal looks 4 plies ahead (one move by either side counts as a ply). You always move first. Only wins are recorded, scored as 50 minus your number of moves. Highest score first; ties go to the shorter time. The server replays your game, including the computer's replies, to verify it.