Ultimate tic-tac-toe online

Ultimate Tic Tac Toe is the strategic upgrade to the classic — nine boards inside one, where every move you make sends your opponent to the next square. Five minutes to learn, a lifetime to outplay.

GAME MODES

• Online Multiplayer — Real-time matches against players around the world. Quick matchmaking, no account required.

• Single Player vs AI — NEW: practice against an on-device AI opponent. No internet needed, no waiting.

• Local Two-Player — Pass-and-play on the same device, with undo and redo so a slip of the thumb never decides a match.

LEARN AS YOU PLAY

New interactive onboarding walks you through the rules move by move. A built-in coach highlights legal squares and explains why every turn sends your opponent where it does.

WHY ULTIMATE?

Classic tic-tac-toe is solved in 30 seconds. Ultimate is a different game: every move is a tactical fork. Win the small board, or trap your opponent in a losing one? Block the next square they're sent to, or set up two boards at once?

HOW TO PLAY

• Board: One large 3×3 grid, where every cell is itself a smaller 3×3 grid (nine small grids in total). • Players: Two players take turns, represented as ■ and ●. • First Move: Anywhere among the 81 empty cells. • Subsequent Moves: Where you play in a small grid sends your opponent to the matching small grid for their next move. • Open Squares: If your opponent is sent to a small grid that's already won or full, they may play in any remaining cell on the board.

Win three small boards in a row to win the game.

Available in English, German, Spanish, Czech, Russian, and Simplified Chinese.