TicTacToku

TicTacToku fuses two classic games into one fast, competitive puzzle.

THE TWIST
The board is a 9x9 Sudoku grid split into 9 boxes — and each box doubles as a square on a Tic-Tac-Toe board. Solve a box correctly (valid Sudoku digits, 1-9) and it's yours. Claim three boxes in a row, column, or diagonal before your opponent does, and you win the match.

HOW A MATCH WORKS
- Race Mode: you and an opponent solve the same puzzle at the same time, each
on your own private board.
- Every box you complete is claimed with an X or an O.
- First to three claimed boxes in a row wins — even if your Sudoku isn't
finished yet.
- No human around? Play a computer opponent anytime.

PLAY YOUR WAY
- Jump in instantly as a guest, no account needed.
- Sign in with Google to keep your name and stats across devices.
- Ranked matches track an ELO rating, so every win means something.
- Climb the global leaderboard and see how you stack up.

BUILT FOR FAIRNESS
Every move is validated on our servers, not just trusted from your device, so matches stay fair from the first cell to the last box.

FREE TO PLAY
TicTacToku is free, with lightweight ads supporting development. No pay-to-win, no loot boxes — just a fast, sharp puzzle battle.

Quick to learn if you know Sudoku. Impossible to master when someone's racing you on the same grid.