Sudoku

About Sudoku Unblocked

Sudoku unblocked is available to play for free online. Sudoku is a classic number-placement puzzle that challenges your logical thinking and pattern recognition skills. Fill a 9x9 grid divided into nine 3x3 subgrids with numbers 1-9, ensuring each number appears only once in every row, column, and box. Start with a partially filled grid and use deductive reasoning to solve the puzzle. With multiple difficulty levels from easy to expert, Sudoku offers endless brain-teasing entertainment. The clean interface and helpful hint system make it perfect for both beginners and experienced puzzle solvers.

Game Screenshots

How to Play

• Select a cell: Click on an empty square to select it
• Enter numbers: Type or click numbers 1-9 to fill cells
• Use notes: Enable note mode to mark possible candidates
• Check validity: Invalid entries will be highlighted in red
• Complete the grid: Fill all cells following Sudoku rules
• Win: Successfully complete the puzzle without any conflicts

Game Features

Game Tips & Strategies

• Start with the easiest cells: Fill in numbers where only one option is possible
• Scan rows and columns: Look for numbers that can only go in one place
• Use pencil marks: Note potential numbers in empty cells
• Focus on one number: Try to place all instances of a single number first
• Check 3x3 boxes: Sometimes box constraints reveal hidden singles
• Look for naked pairs: Two cells with same two options eliminate those from other cells
• Take breaks: Fresh eyes often spot patterns you missed