Sudoku

Fill every row, column and 3×3 box with the digits 1 to 9. Every puzzle is freshly generated with exactly one solution across Easy, Medium, Hard and Expert, plus a new Daily Challenge each day. Pencil in notes, undo, grab a hint, and watch rows and boxes light up as you complete them. Three mistakes ends the game unless you switch the limit off, and your in-progress puzzle, best times and wins are saved on this device.

How to play

Pick a difficulty or the Daily Challenge. Select a cell, then choose a number from the pad. Each row, column and 3×3 box must contain 1–9 exactly once. Turn on Notes to pencil in candidates, use Undo or Erase to fix entries, and Hint to reveal one correct cell (3 per game). Wrong numbers count as mistakes; three mistakes ends the game unless the limit is turned off.

Controls

Tap or click a cell, then a number. Keyboard: arrow keys move, 1–9 fill (Shift+digit adds a note), N toggles notes, Backspace/Delete erases, Z undoes, H gives a hint, Esc or P pauses.

Privacy and saves

No account, ads, or network requests. Settings, statistics, and your in-progress puzzle are stored only in this browser's localStorage.

A Quokka Labs original browser game · Free to play · No download