Utilz
Sudoku
Play the classic number puzzle game online
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Why Play Sudoku?
- Improves logical thinking and concentration skills.
- Three difficulty levels from beginner to expert.
- Notes mode, error highlighting, and timer to track your progress.
Sudoku Rules
Fill every row, column, and 3x3 box with the numbers 1 through 9. Each number may appear only once per row, column, and box. Pre-filled numbers are clues — use logic to determine the rest.
How to Play
- Select a difficulty level: Easy, Medium, or Hard
- Click an empty cell and enter a number (1-9) using the number pad or keyboard
- Each row, column, and 3x3 box must contain all numbers from 1 to 9
- Use Notes mode to pencil in candidate numbers for tricky cells
FAQ
What are the rules of Sudoku?
Fill every row, column, and 3x3 box with the numbers 1-9. Each number can only appear once in each row, column, and box. Use the pre-filled numbers as clues to solve the puzzle logically.
How does the difficulty level work?
Easy puzzles start with 38 clues, Medium with 30, and Hard with 24. Fewer clues means more cells to fill and a harder puzzle to solve.
What is Notes mode?
Notes mode lets you pencil in small candidate numbers in empty cells. This helps you track possible values for each cell and is essential for solving harder puzzles.