How to Play
Goal
Fill every empty cell so that each row, column, and 3×3 box contains the digits 1 through 9 exactly once.
How to Play
Click or tap a cell, then choose a digit from the number pad or press 1–9 on your keyboard. Press Delete, Backspace, or 0 to erase. You can also clear a cell by pressing its current digit again. The small number under each pad digit shows how many of that digit are left to place.
Pencil Marks
Toggle Notes mode (click the Notes button or press P) to enter small candidate numbers in empty cells. These help you track possible digits.
💡 Tips
Start with rows, columns, or boxes that have the most filled digits. Look for cells where only one digit is possible. Use pencil marks to narrow down candidates.
🔢 Game Numbers
Each deal is identified by a game number (1–2,147,483,647). Click the game number to replay a specific deal or share it with friends.
⌨️ Keyboard Shortcuts
- 1–9
- Place digit
- Del / 0
- Erase
- P
- Notes
- N
- New Game
- U
- Undo
- H
- Hint
- ↑↓←→
- Navigate cells
Statistics
- Games Played
- 0
- Games Won
- 0
- Win Rate
- —
- Current Streak
- 0
- Best Streak
- 0
- Best Time
- —