Free Sudoku Online
Play classic, jigsaw, killer, diagonal, and hyper sudoku for free!
Controls
• Press 1-9 to input numbers
• Press D to toggle draft mode
• Press Delete/Backspace to clear
• Click same cell to deselect
• Press Escape to deselect
Generating puzzle...
Controls
Numbers
What is Sudoku? Play Free Sudoku Online
Sudoku is the world's most popular number puzzle game. Our free sudoku online platform offers the best web sudoku experience with multiple game modes including Classic, Killer, Diagonal, Hyper, and Jigsaw Sudoku puzzles. Whether you're a beginner or expert, enjoy free sudoku games with intelligent hints and beautiful design.
Play sudoku online for free and train your brain with our collection of sudoku puzzles. Our web sudoku interface is optimized for both desktop and mobile devices, making it the perfect platform for daily brain training and logical thinking improvement.
Sudoku is a logic-based number puzzle game that has captivated millions worldwide. This popular web sudoku game challenges players to fill a 9×9 grid with digits 1-9, ensuring each number appears exactly once in every row, column, and 3×3 subgrid.
Our free sudoku online platform offers the perfect digital experience for puzzle enthusiasts of all skill levels. Whether you're a beginner learning the basics or an expert seeking the ultimate challenge, our web-based sudoku puzzles provide hours of engaging mental exercise.
How to Play Sudoku Online
Basic Rules
- •Fill the entire 9×9 grid with numbers 1 through 9
- •Each row must contain all numbers 1-9 without repetition
- •Each column must contain all numbers 1-9 without repetition
- •Each 3×3 subgrid must contain all numbers 1-9 without repetition
Web Sudoku Controls
- •Click any cell to select it
- •Use keyboard numbers 1-9 to fill cells
- •Press 'D' to toggle draft mode for notes
- •Use Delete/Backspace to clear cells
- •Click the Hint button for assistance (3 hints per puzzle)
Easy Sudoku Solving Techniques
Easy Sudoku puzzles contain 36-40 given numbers, providing generous clues for logical deduction. These puzzles are designed to be solved using only naked singles and hidden singles techniques. Focus on completing regions with the most filled cells first, as they offer the clearest solving paths. Master these fundamental techniques before progressing to harder difficulties.
Key Techniques for Easy Sudoku:
- ✓Naked Singles: Identify cells where only one number can legally fit based on row, column, and box constraints. This fundamental technique forms the backbone of all Sudoku solving.
- ✓Hidden Singles: Locate numbers that can only be placed in one specific cell within a row, column, or 3x3 box, even when that cell has multiple candidate numbers.
- ✓Scanning Method: Systematically examine each row, column, and 3x3 box to identify missing numbers. Use visual scanning to spot obvious placements.
- ✓Cross-hatching Technique: Methodically eliminate possibilities by checking intersections between rows, columns, and boxes to narrow down candidate numbers.
- ✓Pencil Mark System: Use small notations to track possible numbers in each cell, creating a visual map of all potential solutions.
- ✓Box-Line Reduction: When a number in a box is restricted to one row or column, eliminate that number from the same row/column in other boxes.
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