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Introducing TicTacToku — multiplayer Sudoku meets Tic-Tac-Toe. Race an opponent to complete Sudoku boxes; claim three in a row to win. Play as a guest or sign in with Google to keep your name and stats. Ranked matches with ELO and a global leaderboard.
Race an opponent to solve Sudoku boxes. Claim three in a row to win!
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.