About Sudoku

Play Sudoku free in your browser. Every number has its place. No download or sign-up required.

How to play Sudoku

  1. Use each number once. Fill each row, column, and 3 × 3 box with the numbers 1 through 9. The darker printed numbers are fixed clues.
  2. Choose a square, then a number. Use the number buttons or your keyboard. Arrow keys move between squares. Backspace or Delete erases an entry.
  3. Make a pencil note. Turn on Notes to record possible numbers in an empty square. Enter the same note again to remove it. Notes do not count as answers.
  4. A little help. Check marks incorrect entries. Hint fills one square with its correct answer; you can undo it. Every generated puzzle has exactly one solution.

Players and saved progress

Play on your own, without an account. Progress is saved in this browser on this device. It does not sync to other devices.

Use the Comfort button for larger card faces, contrast, sounds, timer visibility, and reduced interface motion. Arcade movement remains active.

More puzzles & logic games

Browse all games

Make yourself comfortable.

A few small adjustments, just for you.

Remembered across all games on this device.

A familiar game, a quick refresher.

  1. Build the four foundations. Place aces in the top-right spaces, then build up to kings in the same suit.
  2. Alternate colors on the table. Place a red 6 on a black 7, for example. You can move an entire face-up sequence.
  3. Make room for kings. Only a king, or a sequence starting with one, can move to an empty column.
  4. Turn over a new card. Click the face-down deck. When it runs out, click again to recycle. You can go through it as often as you like.

Keyboard: Tab to a card and press Enter to select it. Tab to the destination and press Enter again. Escape clears your selection. You can also drag cards.

Deals are random; some cannot be won. Hints suggest legal moves, not a guaranteed solution.

A fresh start?

This will replace your current game and undo history.

Beautifully played.

Enjoy that little moment. You earned it.