Click/Tap Continue to show your rank and time.Ĭlick/Tap to see the completed grid for a few seconds.įeatures vary depending on your device, its orientation and screen space. When you have completed the Sudoku a ‘congratulations’ message will appear. Click/Tap Resume to go back to the Sudoku.Ĭlick/Tap Reset to clear the grid and restart the Timer. is a website for free online sudoku.The sudoku puzzles are classified according to 5 levels of difficulty: sudoku easy, medium, hard, expert and evil.You can play Sudoku on your mobile, tablet or computer for free. SettingsĬlick/Tap to show/hide extra highlighting of correct rows, columns and 3×3 boxes.Ĭlick/Tap to allow/disallow deleting correct numbers in completed rows, columns or 3×3 boxesĬlick/Tap to show Help. The Hint counter will tell you how many of your five Hints remain.Īlternatively, Click/Tap the Check tick and select Clear to remove any incorrect numbers from the squares or select Reveal to highlight the incorrect entries or Cancel.Ĭlick/Tap to abandon play and return to the home screen, saving your current progress. If you get stuck, select the square you want to fill and Click/Tap the Hint wand. The Timer will stop but you won’t be able to see the puzzle.Ĭlick/Tap Resume playing to go back to the puzzle.įor mobile devices where there’s less screen space, you may need to Click/Tap Pause to show your time. Focus on one sub-grid: Pick one of the four sub-grids, and start filling in the numbers 1-4 in the. One last thing: All sudoku puzzles published on this website have only one solution and can be solved using logic. The solutions are available on the puzzle page and are printable as well. Note: For more free printable sudoku, see the 100 Free Printable Sudoku Puzzles page. Choose from easy, medium, hard, or very hard level of difficulty. Check the downloads section to see whats available right now. The 100 puzzles below are in a large, one-per-page format. All puzzle packs come complete with solutions at the end of the book. This will help you to identify which numbers are missing and which numbers have already been used. also offers monthly and seasonal traditional sudoku puzzle packs that you can print. For trickier puzzles, click Options to turn on pencil marks. After entering a number, check to see where else it has to go. Try adding numbers which already appear often in the Sudoku puzzle. Start by scanning the puzzle: Look at the puzzle and identify any numbers that are already filled in. Look for rows, columns and 3×3 boxes with just a few blanks remaining. When you have correctly completed a line, column or a 3 x 3 box it will be highlighted and any practice numbers will disappear.Ĭlick/Tap Pause to have a break. How to Solve Sudoku 4x4 Puzzles Step by Step.