About game
Logic puzzle addicts will find their new daily obsession with Sudoku 9. This classic number grid challenge forces you to flex your brain cells while you aim for the perfect solve. You face a 9x9 board where every row, column, and block must hold digits one through nine without any repeats. Tapping an empty square lets you input your guess, while the pencil tool keeps track of potential candidates when you feel stuck. Four distinct difficulty tiers allow you to ramp up the challenge as your skills grow. Tracking your progress through detailed stats keeps your sessions competitive and clear. Switching between light and dark themes makes late-night sessions easy on your eyes. You can play Sudoku 9 right in your mobile or desktop browser without downloading any heavy files.
How to play
The goal is to fill the 9×9 grid with the digits 1 to 9 so that each row, each column and each 3×3 box contains no repeated digits.
Controls:
• Tap an empty cell, then pick a digit 1–9 at the bottom of the screen.
• "Notes" (pencil) — write several possible candidates into a cell.
• "Hint" — reveals the correct digit in the selected cell.
• "Erase" — removes your digit; "Undo" — reverts your last move.
• No more than 3 mistakes are allowed per game.
On a computer: keys 1–9 to enter, arrow keys to move, Backspace to erase, N for notes, H for a hint.
On phone and tablet — touch controls.
Features
- Daily challenge: Tackle a fresh logic board every single day to maintain your streak.
- Mistake limit: Keep your focus sharp because you only have three chances to get a digit wrong.
- Smart input: Use the erase and undo buttons to fix any slip-ups during your logic session.
- Language support: Change the interface text to suit your preference for a comfortable experience.
- Progress tracking: Monitor your performance with statistics that log your wins and completion times.
Who is it for
Logic enthusiasts who crave a mental workout appreciate the clean interface of this classic number puzzle. Casual gamers looking to sharpen their focus during short breaks will enjoy the straightforward design. If you enjoy testing your pattern recognition skills, this browser-based challenge fits your daily routine perfectly.
Controls
Select cell
Tap a square on the grid or click it with your mouse to highlight your target.
Enter digit
Tap a number at the bottom of the screen or press keys 1-9 on your keyboard.
Manage candidates
Activate the pencil icon for notes or press N on your keyboard to toggle note mode.
Correct moves
Use the erase button, backspace key, or the undo function to clear mistakes quickly.
FAQ
How do I win in Sudoku 9?
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Fill every empty cell so that rows, columns, and 3x3 blocks contain digits 1-9 exactly once.
Can I use hints in Sudoku 9?
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Yes, clicking the hint button reveals the correct number for the currently selected cell.
Does Sudoku 9 work on my phone?
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Absolutely, the game is fully optimized for touch controls on mobile browsers.
