A little focus. A little joy. Find your flow, one number at a time.
A fresh daily set is ready.
Choose an empty square, then a number. You’ve got this.
Keyboard friendly 1–9 numbers N notes ⌫ erase ← ↑ ↓ → move
Classic Sudoku rules Fill every row, column and 3×3 box with the digits 1–9, using each digit exactly once. The given numbers stay fixed. Start with an empty square and check all three groups.
Pick an easy, medium or hard Sudoku and take it at your own pace. Every daily puzzle has one solution. Everyone gets the same three boards for the UTC date, so you can share a challenge with a friend. The timer is there for your curiosity; there is no time limit or penalty for taking a break.
The hint button starts with an area to investigate. Ask for another nudge to see the reasoning, then reveal the next entry when you are ready. Easy puzzles use singles, medium puzzles introduce locked candidates, and hard puzzles also need naked pairs. Our difficulty labels describe the techniques used by this game.
Finished the daily set? Switch to Free play for a fresh board. Your current boards, completed puzzles and unlocked color themes are saved in this browser. Use the same device and browser to continue where you left off. Clearing site storage clears that progress.