Sudoku
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Sudoku is a legendary number puzzle game that has captivated millions of players worldwide. Your goal is to fill a 9×9 grid with digits 1-9, ensuring each row, column, and 3×3 box contains every number exactly once. With simple rules but infinite complexity, Sudoku offers the perfect balance of challenge and satisfaction for puzzle enthusiasts of all skill levels. Whether you're a beginner looking for a relaxing brain exercise or an expert seeking the ultimate mental challenge, Sudoku delivers endless hours of logical entertainment.
Complete the grid by placing numbers 1-9 in every row, column, and 3×3 box without repetition. Challenge yourself to solve puzzles faster and with fewer mistakes. Track your progress across multiple difficulty levels from Easy to Expert.
Click on an empty cell and enter a number from 1-9. Each row, column, and 3x3 box must contain all digits 1-9 exactly once. Use the notes feature to pencil in possible candidates. Wrong entries are highlighted in red.
Click any cell to select it, then press 1-9 to enter a number. Press Delete, Backspace, or 0 to clear a cell. Use the Notes mode toggle to switch between entering final answers and pencil marks.
Modes & Variants
Start with the main game above, or open a focused landing page for a specific difficulty, board size, or play mode.
Play easy Sudoku puzzles online for free. Perfect for beginners to learn the basics. Simple 9x9 grids with more given numbers to help you get started.
Challenge yourself with medium difficulty Sudoku puzzles. Perfect for players who have mastered easy puzzles and want more of a challenge.
Test your skills with hard Sudoku puzzles. These expert-level grids require advanced techniques like X-Wing and Swordfish patterns.
Daily logic puzzle
Use this quick path after a round to understand the game, improve your score, and jump into the closest related games or guides.
Players want instant Sudoku with difficulty choices, clear rules, and solving help when they get stuck.
Emphasize difficulty modes, notes, mistake recovery, and daily practice loops.
Add solving technique explanations, beginner progression, and links to 2048, Killer Sudoku, and Kakuro.
No. Sudoku uses digits, but the puzzle is about logic, placement, and elimination rather than arithmetic.
Start with easy boards, scan rows and boxes systematically, use notes, and learn pairs, triples, and hidden singles before advanced patterns.
Want to master Sudoku? Read our comprehensive strategy guide with expert tips and techniques.
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