Free 1v1 multiplayer Sudoku
Play Sudoku online against real opponents
Action Sudoku turns the classic number puzzle into a live match. Race a real opponent on the same board in 1v1 multiplayer Sudoku, climb the ranked ladder, solve a new daily Sudoku challenge, or play the classic journey offline. Free on iOS and Android.
- Free to play
- No pay-to-win
- Plays offline
- iOS · Android
Live preview — tap the labels under the phone to switch screens.
Game modes
Six ways to play Sudoku
Competitive modes need a connection and a second player. Classic Journey and the daily puzzle work on their own, offline, whenever you want a quiet board.
Action Sudoku (1v1)
Real-time 1v1 multiplayer Sudoku. You and your opponent race the same board — every cell you solve first is a cell they can't score. Matches run 3 to 10 minutes.
- 2 players
- 3–10 min
- Live
Classic Journey
A single-player Sudoku level map you can play at your own pace, online or off. Track personal bests per level and compare them against the global best time.
- Solo
- Offline
- Level map
Daily Sudoku Challenge
One fresh Sudoku puzzle every day on a browsable calendar. Keep a streak, catch up on days you missed, and earn coins and cosmetics as you go.
- Solo
- New daily
- Streaks
Co-op Sudoku
Solve one shared board together with a friend. Mistakes are shared too, so co-op rewards talking through deductions instead of racing.
- 2 players
- Shared board
- Live
Bot Practice
Warm up against bots tuned to human solving speeds and error rates. The best way to learn the match format before you queue against people.
- Solo
- Adjustable
- No rating
Ranked Matches
Unlocked through progression. Ranked 1v1 Sudoku moves your rating on every result and places you on the global leaderboard.
- 2 players
- Rated
- Leaderboard
How it works
How a multiplayer Sudoku match works
The rules of Sudoku do not change — every row, column and 3×3 box still holds the digits 1 to 9 exactly once. What changes is that someone else is solving the same grid at the same time.
- 01
Pick a mode and difficulty
Choose 1v1, ranked, co-op or a bot match, then set difficulty and match length. Matchmaking pairs you with someone in a few seconds.
- 02
Race the same board
Both players get an identical Sudoku grid. Every correct digit scores, and finishing a row, column or 3×3 block pays a completion bonus.
- 03
Three mistakes and you're out
A wrong digit costs you a life. Lose all three and the match ends, so pushing for speed always trades against certainty.
- 04
Bank the rewards
Wins pay rating, XP and coins. Coins buy profile titles, animated frames and board themes — cosmetics only, never solving power.
Playable in your browser
Play a free Sudoku puzzle right here
A full 9×9 Sudoku, free and with no download or account. Pick easy, medium, hard or expert — every board is generated fresh with exactly one solution, so it is always solvable by logic alone, never by guessing.
Tap a cell and choose a digit, or use your keyboard: arrow keys to move, 1–9 to fill, N for pencil marks. Mistakes are counted against the three-life rule a real 1v1 match runs on, but they will not end your puzzle here.
Then take on a real opponentWhat's in the game
Built for people who already like Sudoku
Sub-5-second matchmaking
Queue into a live 1v1 Sudoku match against a real opponent, usually in under five seconds. Play with friends directly from your friends list.
Three-mistake limit
Guessing has a price. The three-life rule is what turns Sudoku from a solitary puzzle into a game with real risk management.
Daily puzzle and streaks
A new Sudoku puzzle every day with a calendar you can browse backwards, plus streak tracking and daily quests to keep you sharp.
Board themes and cosmetics
Unlock board skins, animated avatar frames and profile titles. Everything cosmetic is earnable with coins from normal play.
Plays offline
Classic Journey and the daily puzzle work without a connection, so the game is still useful on a plane or underground.
No pay-to-win
No hint packs that decide matches, no purchased advantage. Everything that affects a result is earned at the board.
Free, no account
Everything else here is free too
Boards at every difficulty, a solver for when one has beaten you, printable sheets, and the techniques that get a stalled grid moving again. None of it needs the app.
Sudoku solver
Type in the grid you are stuck on. Take one digit and carry on, or fill the whole thing. Runs on your device.
OpenPrintable Sudoku
Pick a difficulty and how many puzzles per page, then print or save a PDF. Answer key on its own sheet.
OpenSolving techniques
Ten techniques from naked singles to the XY-Wing, each stepped through on a real grid.
OpenBoards by difficulty
Easy through expert, every one carved to a single solution, so it is never a guess.
OpenDaily puzzle
The same board for everybody, new every day, with an archive of the last three months.
OpenSudoku for kids
4×4 and 6×6 grids for children learning the rules, printable and playable.
Open
Questions
Frequently asked questions
Is Action Sudoku free to play?
Yes. Action Sudoku is free to download and play on iOS and Android. Every game mode — 1v1 multiplayer, ranked, co-op, the daily challenge and Classic Journey — is available at no cost. Optional purchases are cosmetic only.
How does multiplayer Sudoku work?
Both players are given the same Sudoku board at the same time. You each solve it on your own device and score points for every correct digit, with bonuses for completing a row, column or 3×3 block. The higher score when the timer ends wins the match.
Can I play Sudoku online with friends?
Yes. Add friends in the social hub and invite them directly into a 1v1 match or a co-op board. You can also queue into public matchmaking to be paired with a random opponent of a similar rating.
What happens if I make a mistake?
Each player has three lives. Entering a digit that does not belong in a cell costs one life, and losing all three ends your match. Because of this, playing quickly always carries risk against playing accurately.
Can I play Sudoku offline?
Yes. Classic Journey levels and the daily Sudoku challenge are playable without an internet connection. The live modes — 1v1, ranked and co-op — need a connection because they run against another player in real time.
Is Action Sudoku good for brain training?
Sudoku is a logic and pattern-recognition exercise, and the timed match format adds working memory and decision-making under pressure. Action Sudoku tracks your solve times, accuracy and streaks so you can see how your speed changes over time. It is a game, not a medical or cognitive-therapy product.
What difficulty levels are available?
Puzzles run from easy through to expert. In live modes you pick the difficulty before the match starts, and both players get a board of the same difficulty so the race stays fair.
Which devices does Action Sudoku run on?
Action Sudoku is available on iPhone and iPad through the App Store, and on Android phones and tablets through Google Play.
Play multiplayer Sudoku free
Download Action Sudoku on iOS or Android, add your friends, and take your first 1v1 Sudoku match. Every mode is free.
- Secure sign-in
- Fair matchmaking
- No pay-to-win