Play Free Sudoku Online - Classic Logic Puzzle Game

How to Play Sudoku

1. Objective: The goal is to fill the 9x9 grid with numbers so that each row, column, and 3x3 section contains all digits 1-9.
2. Gameplay: Click an empty cell to select it, then use the number palette to place a digit.
3. Controls: Use Undo to revert your last move or the Erase (⌫) button to clear a selected cell.
4. Winning: When all cells are correctly filled, you've solved the puzzle. Use Check to validate.

Strategy & Tips

• Start with Obvious Numbers: Look for rows, columns, or 3x3 boxes that already have many numbers filled in. These areas are easier to complete.
• Use Notes Mode: Enable Notes mode to mark possible numbers in cells. This helps you see all possibilities before making a decision.
• Look for Patterns: Scan for numbers that can only go in one specific cell within a row, column, or box.

Sudoku Benefits for Brain Health

• Improves Memory: Exercise your working memory and pattern recognition
• Enhances Logic: Develop critical thinking and problem-solving skills
• Reduces Stress: Focus on puzzles to relax and clear your mind
• Prevents Cognitive Decline: Keep your brain active and sharp

Frequently Asked Questions

What difficulty levels are available?

We offer multiple difficulty levels: Easy (default), Medium, Hard, and Extreme. Each level provides a different challenge suitable for various skill levels.

Is this game really free?

Yes, this online Sudoku game is 100% free to play. There are no downloads, no sign-ups, and no hidden costs. Just instant puzzle-solving fun!