Sudoku Online
Play Sudoku Online, a feature-rich digital version of the classic number puzzle. Fill the 9x9 grid with digits so that each column, row, and 3x3 box contains all numbers from 1 to 9. Enjoy multiple difficulty levels, hints, and a user-friendly interface!
Sudoku Online
Welcome to Sudoku Online!
Sudoku Online is a feature-rich digital version of the classic logic-based number placement puzzle. Fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids contains all of the digits from 1 to 9. With a clean interface, helpful tools, and multiple difficulty levels, Sudoku Online offers an enhanced puzzle-solving experience for players of all skill levels!
Game Features
- Unlimited puzzles with five difficulty levels from easy to extreme
- Smart hint system that provides targeted assistance when you're stuck
- Advanced note-taking tools with auto-pencil marking functionality
- Real-time error checking with optional mistake highlighting
- Customizable themes and display options for comfortable play
- Statistics tracking to monitor your progress and improvement
- Daily challenges with special rewards and achievements
How to Play
- Select your preferred difficulty level to start a new puzzle
- Study the initial numbers placed on the 9x9 grid
- Remember that each row, column, and 3x3 box must contain numbers 1-9 without repetition
- Click on an empty cell and enter a number you believe belongs there
- Use the pencil mark feature to note potential candidates for cells
- Apply logical deduction techniques to eliminate impossible candidates
- Continue filling in numbers methodically until you complete the entire grid
Tips for Success
• Begin with the scanning technique - check each row, column, and box to identify where each number must go
• Use the process of elimination - mark all possible candidates for each cell
• Look for "naked pairs" - when two cells in a unit can only contain the same two numbers
• Identify "hidden singles" - when a number can only go in one position within a row, column, or box
• For advanced puzzles, learn techniques like X-Wing, Swordfish, and XY-Wing patterns
• Use hints strategically when truly stuck rather than guessing randomly
• Practice regularly with increasing difficulty levels to improve your solving skills
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