Sudoku Puzzle
Play free Sudoku puzzles with three difficulty levels. Challenge your logical thinking and number placement skills. Perfect for brain training.
How to Play Sudoku
Click on an empty cell to select it. Given numbers are shown in blue.
Use the number pad or your keyboard (1-9) to place a number in the selected cell.
Fill the entire grid so each row, column, and 3×3 box contains digits 1-9 exactly once.
Press Backspace or click ✕ to clear a cell. Complete the puzzle to see your time.
Tips to Improve Your Score
- Start with easy puzzles to learn the basic patterns
- Scan each row, column, and box before placing a number
- Use the process of elimination — figure out what CAN'T go in a cell
- Look for rows or columns that are almost complete
- Don't guess — every Sudoku puzzle can be solved with pure logic
Frequently Asked Questions
What are the rules of Sudoku?
Fill a 9×9 grid so that each row, column, and 3×3 box contains the digits 1 through 9 exactly once. No number can repeat in any row, column, or box.
What strategies help solve Sudoku?
Start by scanning rows and columns for missing numbers. Use the 'pencil mark' technique — note possible numbers in each cell. Look for 'naked singles' (cells with only one possible number) and 'hidden singles' (numbers that can only go in one cell within a row/column/box).
Is Sudoku good for your brain?
Yes! Sudoku exercises logical reasoning, pattern recognition, and working memory. Regular puzzle solving has been associated with maintaining cognitive function as we age.
About the Sudoku
The Sudoku is one of our most popular brain training exercises. Designed to test and improve your cognitive abilities, this game provides instant feedback on your performance.
Regular practice with this type of cognitive exercise can help improve your mental processing speed, accuracy, and overall brain health. We recommend practicing for 10-15 minutes daily for the best results.
Your scores are saved locally on your device, allowing you to track your progress over time. Challenge yourself to beat your personal best with each attempt!