Start with what’s missing
Look for a row, column or box with just a few empty squares. Check which numbers can fit.
A LITTLE FOCUS. A FRESH START.
Sudoku.
00:00
Your next quiet challengeAutosave on
A fresh puzzle, just for you. Start anywhere.
SIMPLE RULES. ENDLESS POSSIBILITIES.
Nine numbers. One satisfying solution.
Fill every row, column and outlined 3 × 3 box with the numbers 1 through 9, using each number once. The dark starting numbers stay fixed. Everything else is yours to discover.
Every puzzle here has exactly one solution and can be solved with logic. Take your time: there is no time limit and no penalty for trying.
Leave yourself a note
Turn on Notes to pencil in possibilities. Entering a number removes it from notes in its row, column and box.
A nudge when you need it
Hints explain a logical next step before filling a square. Check reviews your entries without taking away your progress.
A few good things to know
What do the difficulty levels mean?
Easy puzzles use single candidates. Medium adds numbers that have only one possible place in a row, column or box. Hard also uses candidate elimination, such as locked candidates and naked pairs. All three levels are solvable without guessing.
Will my Sudoku progress be saved?
Yes, when browser storage is available. Your current puzzle, notes, undo history and preferences save on this device. Return in the same browser to continue. Clearing browser data removes the save; it is not synced to your account or other devices.
What do the highlighted squares mean?
The gold square is your selection. Soft green shows its row, column and box; matching numbers receive a stronger highlight. A red number with a small marker means it repeats in a group. You can turn conflict highlighting off in Settings.
Can I use a keyboard?
Yes. Arrow keys move between squares; 1–9 enter a number; Backspace or Delete erases; N toggles notes; Ctrl or Command + Z undoes, and Shift + Ctrl or Command + Z redoes. Tab moves between the board and controls.