A fresh place to start
Today offers a Medium puzzle for the day. Choose from Trivial through Nightmare when you want a different challenge. Try X Sudoku to add both long diagonals to the usual rules.
Classic & X Sudoku
A little challenge.
A little help.
Your kind of Sudoku.
Settle into a daily puzzle, work through a harder grid, or learn what makes a move possible. You choose how much help to receive.
Play in your browser. No account needed. The game may take a moment to load the first time.
| 5 | 3 | 7 | ||||||
| 6 | 1 | 9 | 5 | |||||
| 9 | 8 | 6 | ||||||
| 8 | 6 | 3 | ||||||
| 4 | 8 | 3 | 1 | |||||
| 7 | 2 | 6 | ||||||
| 6 | 2 | 8 | ||||||
| 4 | 1 | 9 | 5 | |||||
| 8 | 7 | 9 |
Make the puzzle your own
Help you can dial back
Play with no assistance, use your own pencil marks, or ask for legal candidates and conflict checks. Singles highlighting is off by default, leaving the deductions to you.
See why a move works
Hints explain naked and hidden singles. Watch the solver work at a comfortable speed, follow its moves in the activity log, or solve instantly from the original clues.
Learn to look before you guess
Sudoku uses logic, not arithmetic. Start with a row, column or box that already has several digits. Write down what is missing, then check where those digits could go. A cell with one remaining possibility is a naked single; a digit with only one possible home in a group is a hidden single.
These two ideas can unlock a surprising amount of a puzzle. Our guide explains the difference with small worked examples.
Explore naked and hidden singles →Bring a puzzle you want to solve
Import your own clues as text or a nine-row CSV. Photo import is available when the image-recognition service is configured. Review the clues, select classic or X Sudoku, and finish editing to check that the puzzle has exactly one solution before you play.