Sudoku is a logic-based number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, row, and 3×3 sub-grid contains all digits from 1 to 9 without repetition.
Yes, Sudoku.by is free to use. We offer a wide range of puzzles that you can play without any charge.
While you can play as a guest, creating an account allows you to save your progress, participate in leaderboards, and access additional features.
Simply click on the 'New Game' button on our homepage. You can select your preferred difficulty level before starting.
Yes, you can pause your game at any time by clicking the 'Pause' button. Your progress will be saved, and you can resume later.
We offer five difficulty levels: Very Easy, Easy, Medium, Hard, and Expert. The difficulty increases based on the number and complexity of logical steps required to solve the puzzle.
Yes, you can undo your last move by clicking the 'Undo' button or using the keyboard shortcut Ctrl+Z (Cmd+Z on Mac).
Try refreshing your browser. If the problem persists, clear your browser cache and cookies. If you're still experiencing issues, please contact our support team.
Yes, Sudoku.by is fully responsive and works on smartphones and tablets. You can access it through your mobile browser without needing to download an app.
We appreciate your help in improving Sudoku.by. Please report any bugs to our support team at info [at] sudoku.by, including as much detail as possible about the issue and your device/browser.
Yes! Check out our 'Tips' section for various techniques to improve your Sudoku skills, from basic to advanced.
Start with easier puzzles and focus on mastering basic techniques like scanning rows, columns, and boxes for single candidates. Our tutorial section provides step-by-step guidance for beginners.
Absolutely! We love hearing from our users. Send your suggestions to info [at] sudoku.by.
Yes, we offer a selection of printable Sudoku puzzles. Look for the 'Print' option when you start a new game.
If you have any questions not covered here, please don't hesitate to contact us at info [at] sudoku.by. We're here to help!