Ultimate Tic Tac Toe

9 boards. 1 winner, Strategy, daily puzzles & AI challenges in one game.

Think you know Tic-Tac-Toe? Think again. Ultimate Tic-Tac-Toe puts a 3x3 grid of boards inside a 3x3 meta-grid. Win a small board to claim that square on the big board - but, the cell you pick in the small grid sends your opponent to the matching big board. Every move ripples forward. Every win sets a trap. It's simple to learn and impossible to master.

Modes:
- Daily Challenge: Free, forever. A new puzzle every day, identical for every player worldwide. 18 moves are pre-placed to create an asymmetric position and then you face the Hard AI with one shot to win. Streak tracking keeps the pressure on.
- vs AI: Three difficulties. (1) Easy plays completely at random. Great for learning the rules. (2) Intermediate uses heuristic evaluation and is a genuine challenge. (3) Hard is full minimax search, not to be taken lightly.
- 2-Player (pass & play): Two players, one device. Perfect for travel or a quick match with a friend.

Stats
Track everything: wins, losses, draws, win streaks, average game time and fastest win - broken out per difficulty. Your daily challenge streak is tracked separately so you always know our best run.

Free Tier vs. Full Version
The daily challenge is free forever. Free users get 1 AI game and 1 two-player game per day (limited to Easy & Intermediate AI). Unlock the full version for a one time fee and get unlimited AI games at all difficulties, including Hard Mode. One-time payment, no subscription, no ads.

Designed for Play
Dark and Light themes with system-mode support. Game timer with per-difficulty performance tracking. Sound effects on every move. Optimized for all modern iPhone and Android screen sizes.