Sudoku of the Day — Free Daily Sudoku Puzzle
One Sudoku puzzle every day, the same for everyone worldwide. No account needed. Track your streak and share your result.
How to Play Sudoku
- Click or tap a cell to select it.
- Type a number from 1 to 9 to fill it in.
- Use Notes mode (pencil button) to jot candidate numbers.
- Press Backspace or Erase to remove a number.
- Fill every cell so each row, column, and 3×3 box contains the digits 1–9 exactly once.
Sudoku Rules
- Every row must contain the digits 1–9 with no repetition.
- Every column must contain the digits 1–9 with no repetition.
- Each of the nine 3×3 boxes must contain the digits 1–9 with no repetition.
- You have a maximum of 3 mistakes before the game ends.
What Makes This Sudoku Different?
The daily puzzle is seeded by today's date in Brazil's time zone (America/São_Paulo). This guarantees that every player worldwide sees the exact same puzzle on the same day. The puzzle resets at midnight Brazil time.
Your progress, streak, and solve time are stored entirely in your browser. There is no server tracking your moves; the game is local-first and works offline.
Frequently Asked Questions
- Is today's puzzle the same for everyone?
- Yes. The seed is the current date in Brazil's time zone, giving every player the same 9×9 grid on the same calendar day.
- Do I need to create an account?
- No. The game works entirely without an account. Sign in with Google only if you want to sync your streak across devices.
- When does the new puzzle appear?
- A fresh puzzle appears every day at midnight Brazil time (UTC-3). A countdown timer is shown once you finish the current puzzle.
- What happens if I make 3 mistakes?
- The game ends after 3 mistakes. You can watch a short ad to earn one extra chance, or wait for tomorrow's puzzle.
Sudoku Strategy Tips
- Start with the digits that appear most often in the given clues — they leave fewer open positions.
- Use pencil marks to track candidates in empty cells before committing.
- Scan rows, columns, and 3×3 boxes for hidden singles: cells where only one digit can go.
- Fast-fill mode lets you lock a digit and click all remaining positions in one sweep.
- Practice mode offers easier puzzles with no mistake limit — great for beginners.
Available Languages
Available in English, Português, Español, Deutsch, Français, 日本語, 中文, and Türkçe.
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