Sudoku Classic

Play Sudoku for free with Sudoku Classic, a number puzzle game made for relaxing breaks and satisfying challenges. Enjoy familiar Sudoku rules, a clean design, and helpful tools that let you focus on your next move. Whether you're solving your first grid or tackling a difficult puzzle, choose your level and play at your own pace.
Take your favorite logic puzzle wherever you go. Play Sudoku offline at home, on your commute, or while traveling. No internet connection is needed to enjoy a game, so there's always room for a little puzzle time in your day.
The rules are simple: fill the 9x9 grid with numbers from 1 to 9 so each number appears only once in every row, column, and 3x3 box. No calculations are required. Use observation, logical thinking, and a process of elimination to find where each number belongs. Every completed row brings you closer to finishing the puzzle.
Sudoku Classic combines these timeless rules with useful features for a comfortable solving experience:
Four difficulty levels
Choose from four levels, from Easy to Expert. Start with an approachable puzzle while you learn the basics, or select a tougher grid when you want a challenge. Switch difficulty to match your experience, your mood, or the time you have available.
A huge variety of puzzles
The built-in puzzle generator offers an enormous range of number combinations. Explore different grids, practice familiar techniques, and enjoy plenty of opportunities to put your reasoning to work.
Play Sudoku offline
Keep your puzzles close, even when you're away from Wi-Fi. Enjoy a game on a flight, during a train journey, or in a quiet spot without a connection. Your next logic challenge can come along wherever you go.
Helpful hints when you need them
Unsure which number belongs in a cell? Use a hint to reveal the correct answer in your selected cell and continue solving. You have three hints per game, giving you a little help when a tricky puzzle leaves you stuck.
Pencil notes for careful planning
Write several possible numbers in a single cell to organize your ideas. Use your notes to compare candidates, follow patterns across the board, and work through more challenging puzzles one step at a time.
Undo with a single tap
Made an accidental entry or changed your mind? Reverse your last action quickly and return to your puzzle. The undo function makes it easy to correct a move while you work toward the solution.
Number and error highlighting
See matching numbers and identify conflicts in a row, column, or 3x3 box. Clear highlighting helps you keep track of the board, spot mistakes, and decide what to check next.
Statistics and personal records
Track your wins and best completion times for every difficulty level. See how your results develop as you practice, revisit your favorite level, and work toward a new personal best.
Automatic progress saving
Pause your puzzle when life gets busy. Your game saves automatically, so you can return later without starting over. Tap Continue Game on the main menu and pick up right where you left off.
Clean design and smooth animations
Enjoy a clear interface, simple controls, and smooth animations. From entering numbers to adding pencil notes, the design keeps everyday actions easy so you can concentrate on solving the grid.
Build a puzzle routine that fits your day. Start your morning with an easy grid, take a thoughtful break between tasks, or settle into an Expert puzzle when you have more time. Play Sudoku for free and enjoy the small discoveries that turn an empty cell into your next confident move.
Whether you want to practice solving techniques or simply unwind with numbers, Sudoku Classic is ready whenever you are.