Sudoku

About Sudoku

Challenge your logical thinking with our online Sudoku game. Fill the 9×9 grid with numbers so that each row, column, and 3×3 section contains all digits from 1 to 9.

How to Play

Fill the grid so that every row, column, and 3×3 box contains the numbers 1 through 9 exactly once.

Sudoku Strategies

• Scanning: Look for rows, columns, and 3×3 boxes where only one number can fit in a particular cell.
• Pencil Marks: Use the Notes feature to keep track of possible numbers for each cell.
• Single Candidate: If a cell has only one possible number, that must be the correct number.
• Single Position: If a number can only go in one position within a row, column, or box, that's where it must go.
• Pairs and Triples: Look for cells that have the same set of possible numbers, which can eliminate those numbers from other cells.

Game Features

• Notes Mode: Toggle this on to add small notes in cells to keep track of possible numbers.
• Hint: Get a hint if you're stuck by having the game fill in a random empty cell.
• Difficulty Levels: Choose from Easy, Medium, or Hard puzzles.
• Time Tracking: Your solving time is tracked, and best times are saved for each difficulty level.
• Mistake Tracking: The game keeps track of your mistakes. Be careful, as too many mistakes will end the game!