Each number appears once
Fill the empty squares with 1 to 9. Each row, column and 3 × 3 box contains every number once.
A little time for a puzzle
Today's Sudoku
Free · No account needed
Bold numbers are given. A cross marks an incorrect entry; an exclamation mark marks a duplicate.
Keyboard: arrow keys to move, 1–9 to enter, Delete to erase, N for notes, Ctrl/⌘ + Z to undo.
Our new address is joyful-classics.com. Old progress remains available in the same browser on the original Vercel game page and does not move automatically to the new address.
Take your time
How Sudoku works
Explore and understand
Use Notes for possible numbers. Explain a move shows a next step or, if you ask, a correction for an incorrect entry. Undo takes a move back.
Pause whenever you like
Your progress is saved in this browser when storage is available. You can return later. It does not sync with other devices.
Our new easy puzzles can be solved using two simple steps: only one number fits a square, or a number fits only one place in a row, column or box. You do not need to guess.
In easy puzzles, your entries are checked against the unique solution immediately. A cross marks an incorrect number; an exclamation mark marks a duplicate. Select a square for an explanation. Check shows all incorrect entries.