Sudoku game
Clean, relaxing number puzzles — unlimited + a new daily every day. No login.
Difficulty
📊 Statistics
Choose a cell, then enter a number. Keyboard: arrows to move, 1–9 to fill, Backspace to erase.
🎛 Controls
📖 How to Play Sudoku
Every empty cell needs a digit 1–9. Tap a cell, tap a number.
Each row, each column, and each 3×3 box holds 1–9 exactly once.
Use notes for candidates, hints when stuck. Complete the grid to win!
How to play Sudoku
Fill the 9×9 grid so each row, column, and 3×3 box contains the digits 1 through 9 once. Choose from four difficulty levels, add pencil marks to track possible values, or use a hint when you need help. You can also play the daily puzzle and keep a streak. Your game runs in the browser without an account or download.
Wins feed your personal statistics: games played and won, best and average times, per-difficulty completions, and daily history. New to the puzzle? Start on Easy with the mistake limit off, lean on notes, and graduate to Expert when rows start solving themselves.
❓ Frequently asked questions
How do I play sudoku here?
Pick a difficulty and press Start. Tap a cell, then tap the number pad (or your keyboard 1–9) to fill it. Every row, column, and 3×3 box must contain digits 1–9 exactly once.
What are notes (pencil marks)?
Toggle Notes mode and tap digits to jot small candidates in a cell — perfect for tracking possibilities. Notes vanish automatically when you enter a final number, and placing a correct digit clears it from peer notes.
How do mistakes work?
A wrong entry turns red and counts as a mistake (Mistakes: 0/3). Three mistakes ends the game — unless you switch the mistake limit off on the setup screen for relaxed play.
What do Hint and Check do?
Hint fills one correct digit for you (it lowers your score a little). Check briefly flashes every current error so you can fix them yourself.
What is Daily Sudoku?
One shared medium puzzle per day for everyone. Finishing it builds your daily streak — play consecutive days to grow it. Past results stay saved in your browser.
How is the score calculated?
Each difficulty has a base score (up to 5000 for Expert), minus points for elapsed time, mistakes, and hints. Fast, clean solves with no hints score highest.
Can I pause the timer?
Yes. Pause hides the board and freezes the clock. Resume or restart anytime from the controls.
Are the puzzles guaranteed solvable?
Yes. Every puzzle is generated from a full valid solution and verified to have exactly one unique solution at every difficulty.
What statistics are tracked?
Games played and won, best and average solve times, current and longest streaks, completions per difficulty, and your daily history — all privately in your browser.
Is sudoku free with no login?
Yes — 100% free, unlimited puzzles, no account, no download. Works on mobile, tablet, and desktop.