Same board for each date
All players in the same mode and on the same date receive the same difficulty and the same Sudoku board.
Th9 11, 2026
Killer
Daily Sudoku Online
You are replaying a Daily Sudoku from the 31-day archive. The puzzle, mode and best result stay locked to this challenge date.
DifficultyHard
Error0 / 3
Time00:00
Score0
9×9 Sudoku board. Use the arrow keys to move between cells; Home and End go to the start or end of a row; Ctrl or Command + Home/End goes to the first/last cell on the board. Keys 1–9 enter a digit in the current mode; Shift + 1–9 adds a quick Note without turning Notes on; 0, Delete, or the numpad decimal key clears a cell; N toggles Notes, A toggles Auto Candidates, and Space pauses the game.
Selected cage
Select a cell
45
Select a cell to see the cage total and possible combinations.
Levels 1–2 only guide you and do not use a hint; level 3 applies the solving step and uses 1 hint.
Tap to enter · press and hold to add a NotePress 1–9 to enter · Shift + number for quick Pencil marks
Select an empty cell to see valid candidates.
Sound & controls
Auto candidates and Notes mode are remembered separately for Classic and Killer. Pause state and game progress are not synced as preferences.
Last 31 days
Daily challenge calendar
0/7 the displayed date was completed in Killer.
View today
How does the Daily Challenge work?
Your best result is retained
Each attempt is recorded separately, but the daily leaderboard keeps only the best result by score and then time.
No data is lost at midnight
A game opened before midnight is still submitted to the previous date. After that, you can switch to the new day's challenge.
Daily Sudoku FAQ
Daily Sudoku questions
Is the Daily Sudoku free to play?
Yes. The Daily Sudoku can be played free in your browser. You can start the Classic daily puzzle without an account and optionally switch to the separate Killer daily challenge.
Does everyone get the same Daily Sudoku puzzle?
Yes. Players using the same mode and challenge date receive the same puzzle and difficulty, so daily scores and completion times are comparable.
Can I play an earlier Daily Sudoku?
Yes. The calendar keeps a bounded 31-day playable archive. Previous dates use the same locked puzzle for that date, while the clean Daily Sudoku landing always opens today.
What happens if I start before midnight and finish after midnight?
The game stays attached to the date on which it started, so a solve that crosses midnight can still be saved to the correct Daily challenge before you open the new day.