SudokuFree, no sign-up
One Sudoku a day. The puzzle changes at midnight Japan time (UTC+9) and is the same for everyone on the same day and level. Every puzzle has a unique solution.
🎉 Solved!
Random practice runs are not added to the leaderboard.
FAQ
How do you play Sudoku?
Fill the 9×9 grid with the digits 1–9. No digit may appear twice in any row, any column, or any of the nine 3×3 boxes outlined in bold.
Does every puzzle have only one solution?
Yes. Every puzzle is built to have a unique solution (we check that the solution stays unique each time a clue is removed). You never need to guess — logic alone is enough.
How do notes work?
Press Notes to switch to note mode; pressing a digit then adds it to the cell as a small candidate, and pressing it again removes it. Entering a final digit clears that cell's notes.
How is the leaderboard ranked?
By the time from opening the puzzle to filling it in correctly, fastest first. You only need a nickname, and you can submit up to 30 times a day per level. The server checks your solution.
"Sudoku" is a registered trademark of Nikoli Co., Ltd. in Japan. This game is not an official product of, and is not affiliated with, the trademark owners.