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 1, 2026
Killer
Daily Sudoku Challenge
You are replaying an earlier daily challenge. The board, mode, and best result are stored separately for this exact date.
DifficultyEasy
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.