Play Sudoku online for free and enjoy classic 9x9 logic puzzles with adjustable difficulty. This Sudoku game gives you pencil notes, hints and a timer to match your skill level.
Tap or click to start a puzzle, choose Easy, Medium, Hard or Expert, and test your logic. The game works on desktop and mobile so you can play anywhere.
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Desktop
- Click a cell to select it or use arrow keys to move between cells.
- Press number keys 1-9 to place a number in the selected cell.
- Press Delete or 0 to clear a cell entry.
- Use a pencil icon or right click to add or remove notes if available.
- Click the hint button to reveal a number and use undo to revert a move.
Mobile
- Tap a cell to select it.
- Tap a number button to enter that number in the selected cell.
- Tap the pencil icon to toggle notes mode for multiple candidates.
- Tap the hint icon to reveal a correct number if you need help.
- Use the undo or clear button to remove an entry.
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Sudoku is a single player logic puzzle played on a 9x9 grid. The objective is to fill every row, column and 3x3 block with the numbers 1 through 9 so that no number repeats in any row, column or block. This online Sudoku game follows the classic rules and adds helpful tools like pencil notes, hints and a timer to track your progress.
Gameplay is simple and focused. Select any empty cell and place a number from 1 to 9. Use pencil mode to add temporary notes when you are not sure. The game offers multiple modes and four difficulty levels so you can play quick easy puzzles or long expert challenges. An optional auto-check or hint system helps you learn faster and avoid repeated mistakes.
The interface is clean and responsive. Choose from several background themes to change the look of the board. Use undo to correct mistakes and view basic statistics like time, completed puzzles and accuracy. Sudoku trains concentration, pattern recognition and logical thinking. Players of all ages can enjoy a calm, brain sharpening experience in short sessions or extended play.
Game Details
Category
Boys
Developer
Unknown
Technology
HTML5
Platform
Web Browser
Devices
Desktop, Tablet, Mobile
Game Features
Classic 9x9 Grid
Play standard Sudoku on a 9x9 board with rows, columns and 3x3 blocks following classic rules.
Four Difficulty Levels
Choose from Easy, Medium, Hard and Expert to match your skill and improve gradually.
Pencil Notes
Add temporary notes to cells to track possible numbers and solve tougher puzzles step by step.
Hints and Auto Check
Use hints to reveal correct numbers and optional auto-check to catch mistakes as you play.
Themes and Statistics
Select different backgrounds and view basic stats like time, completed puzzles and accuracy.
Frequently Asked Questions
Select an empty cell and place a number from 1 to 9 so that no number repeats in any row, column or 3x3 block. Use pencil notes for candidates and hints if you need help.
Yes. The game works on mobile. Tap a cell to select it, tap numbers to enter them, and use the pencil icon to add notes.
Difficulty ranges from Easy to Expert. Easy puzzles use more direct placements. Hard and Expert puzzles require advanced strategies and more time to solve.
Yes. You can use pencil notes, hints to reveal correct numbers, undo to revert moves and an optional auto-check to mark incorrect entries.
Yes. This Sudoku game is available to play online for free with standard features like puzzles, notes and hints.