Daily Sudoku

Today's easy, medium and hard sudoku. Play on screen or print them, and catch up on the last 30 days.

Daily Sudoku gives you three new classic 9x9 sudoku puzzles every day, one easy, one medium and one hard, and it runs free in your web browser. There is no sign-up and nothing to install, and the puzzles are made on your own device, so nothing is uploaded. Everyone who opens the page on the same date gets the same three puzzles, so it works as a sudoku of the day that you can compare with friends. A built-in solver checks that each puzzle has exactly one solution before it is shown. You can also print the day’s puzzles with answers from the Print tab, or go back through the archive.

How to use the Daily Sudoku

Choose the easy, medium or hard puzzle for today (or pick an earlier date).
Tap or click a cell.
Tap a number on the number pad, or type the digit.
To write small candidate notes instead of a digit, turn on pencil mode with the Pencil button or the P or Space key, then pick a number.
If you get stuck, press Hint. It names the technique for the next step, highlights the cells and explains it in one sentence. If one of your digits is wrong, it asks you to fix that first.
Press Check to mark wrong cells in red and see how many cells are left.
Use Reveal cell or Show solution only when you want the answer.
Use undo and redo (Ctrl/Cmd+Z and Ctrl/Cmd+Y) to step back through your moves.

Two play options help as well: “Mark repeated digits in red” and “Remove pencil marks automatically”, which clears a digit’s notes from the cells it sees when you place it. Arrow keys move, digits enter, and Backspace erases. Your progress is saved in this browser, so a reload continues the same puzzle, and Copy link opens exactly the same puzzle on another device.

What are the basic sudoku rules?

Each row, each column and each of the nine 3x3 boxes must contain the digits 1 to 9 exactly once. The puzzle starts with some digits already given, and your job is to fill the empty cells without repeating a digit in any row, column or box. Every puzzle on this site has exactly one solution, so each move you make can be proven from the givens and the cells you have already filled.

Which difficulty is the daily sudoku?

Each day has one easy, one medium and one hard puzzle, and the site grades them by the techniques needed to solve them. Easy puzzles can be solved with naked singles and hidden singles only. A naked single is a cell with just one possible digit left. A hidden single is a digit that has only one possible cell left in a row, column or box.

Medium puzzles need locked candidates (pointing and claiming) or naked and hidden pairs. A pair is two cells in the same unit that share the same two candidates. Hard puzzles need triples, X-Wing, Y-Wing, Swordfish or XYZ-Wing, which are patterns that link several cells across rows, columns and boxes. The site also defines an expert level for puzzles that cannot be finished with these techniques, but the daily page offers easy, medium and hard only.

When does the daily sudoku change?

The daily sudoku changes at your local midnight. The day follows the date on your own device, so a new set of three puzzles appears when that date changes. If your device clock is set to a different time zone, the change happens at midnight in that zone.

Is the daily sudoku the same for everyone?

Yes. Everyone who opens the page on the same date gets the same three puzzles. The puzzles are made from the date rather than stored on a server, so the same date always produces the same puzzles. This is why two people on the same day can compare their solving times.

Can I play yesterday’s sudoku?

Yes, for the past 30 days. The archive has a date picker and Previous day and Next day buttons that go back 30 days. Future days are not available. Days you finished are marked with a tick, and your solving time for each day is kept in this browser.

Can I print the daily sudoku?

Yes. The Print tab prints that day’s three puzzles, easy, medium and hard, with answers. Instead of a seed, the footer shows “daily” and the date, so a printed sheet is easy to match to its day. This is a simple way to get a printable sudoku daily on paper.

Frequently asked questions

Is the daily sudoku free to play?

Yes. It runs in your web browser at no cost, with no sign-up and nothing to install.

Are my puzzles uploaded anywhere?

No. The puzzles are made on your device, and nothing is uploaded.

Does every daily puzzle have one solution?

Yes. The built-in solver checks each puzzle for exactly one solution before it is shown.

Can I print an earlier day’s puzzles?

Yes. Pick the date first, then open the Print tab: it prints the easy, medium and hard puzzles of the chosen day, with the date in the footer.

Can I solve today’s puzzles more than once?

Yes. Start over clears your entries and resets the timer; the puzzle itself stays the same for the whole day.

Why did my timer stop?

The timer runs while you play and stops while the browser tab is hidden or the game is paused. Return to the tab, or press Resume, to start it again.

Will I lose my progress if I reload the page?

No. Progress is saved in your browser on this device, so a reload continues the same puzzle.

What does the Hint button tell me?

Hint names the logical technique that makes the next step, such as Hidden Single or Naked Pair. It highlights the cells involved and explains the step in one sentence.

Printable sudoku for printing puzzles on demand, when you want more than the day’s set.
Easy sudoku for practising puzzles that need only singles, when you are learning the game.
Medium sudoku for puzzles that need pairs or locked candidates, once singles feel easy.
Hard sudoku for puzzles that need advanced patterns such as X-Wing or Y-Wing.
Killer sudoku for a variant that adds cage sums to the classic rules.
Sudoku solver for checking a puzzle you are stuck on.
How to play sudoku for a step-by-step introduction to the techniques behind the hints.