Play sudoku hard for free.
The hard level earns 40 points.
If you finish the game without any mistakes, you can earn up to 80 points.
Don't forget that if you play every day, you get a x2 point bonus for your first game.
Table of content.
What is hard level sudoku?
Hard level sudoku is a type of sudoku puzzle that is considered more challenging than easy or medium level puzzles. In general, hard level sudoku puzzles have fewer clues, or starting numbers, than easy or medium level puzzles. This means that the solver must make more inferences and deductions to fill in the blank squares.
Hard level sudoku puzzles may also have more complex patterns or symmetries than easy or medium level puzzles. These patterns and symmetries can be difficult to spot, and the solver may need to use advanced solving techniques, such as "naked pairs" or "hidden pairs," to make progress.
Solving a hard level sudoku puzzle can be a challenging and time-consuming process, and it may require a high level of skill and experience. However, many people find the process of solving hard level sudoku puzzles to be extremely satisfying and rewarding.
It is worth noting that the level of difficulty for sudoku puzzles can vary significantly, and different sources may have different criteria for classifying sudoku puzzles by difficulty level. Some people may find hard level sudoku puzzles to be relatively easy, while others may struggle with them. Ultimately, the level of difficulty of a sudoku puzzle is subjective and can depend on the individual solver's skill and experience.
How to avoid making mistakes in sudoku?
There are several strategies that you can use to minimize the chances of making mistakes while solving a sudoku puzzle:
- Pay attention to the given clues: Make sure to carefully consider each clue as you work through the puzzle. Double-check your work to ensure that you have not made any errors.
- Keep track of your progress: Use a pencil or pen to fill in the squares as you solve the puzzle. This will allow you to easily erase or make changes if you realize that you have made a mistake.
- Check for errors regularly: As you work through the puzzle, periodically check your work to make sure that you have not made any mistakes. Look for squares that have multiple numbers written in them or for numbers that are not allowed in a particular row, column, or 3x3 grid.
- Use solving techniques: There are many advanced solving techniques, such as "naked pairs" or "hidden pairs," that can help you eliminate incorrect possibilities and make it easier to solve the puzzle.
- Take breaks: If you find that you are making plenty of mistakes or that you are getting frustrated, take a break and come back to the puzzle later with fresh eyes. This can help you approach the puzzle with a clearer mind and may help you spot mistakes that you might have otherwise missed.
Overall, the key to avoiding mistakes while solving a sudoku puzzle is to stay focused and attentive, carefully consider each clue, and periodically check your work for errors. By following these strategies, you can minimize your chances of making mistakes and increase your chances of solving the puzzle successfully.
Is it possible to print a difficult sudoku grid on Sudoku Academy?
It is possible to print a difficult sudoku grid from Sudoku Academy, although the specific steps for doing so will depend on the platform and browser you are using. Here are some general steps that you can try:
- Navigate to the difficult sudoku grid on Sudoku Academy that you want to print.
- Look for a print option in the browser menu. This may be located in the File menu or under a "More" or "Tools" menu, depending on your browser.
- Alternatively, you can try pressing the "Ctrl" and "P" keys on your keyboard simultaneously to bring up the print dialog.
- In the print dialog, make sure that the correct printer is selected and adjust any other print settings as desired.
- Click the "Print" button to start the printing process.
Depending on your browser and printer, you may also have the option to save the sudoku grid as a PDF file rather than printing it directly. This can be a convenient way to save the grid for later use or to share it with others.
Keep in mind that some websites may have restrictions on printing or may not offer a print option at all. In this case, you may need to use a screen capture tool or other method to capture the sudoku grid for printing or sharing.
Why is medium level sudoku more difficult than hard level?
It is worth noting that the level of difficulty for sudoku puzzles can vary significantly, and different sources may have different criteria for classifying sudoku puzzles by difficulty level. Some people may find hard level sudoku puzzles to be relatively easy, while others may struggle with them. Ultimately, the level of difficulty of a sudoku puzzle is subjective and can depend on the individual solver's skill and experience.
That being said, in general, "hard" level sudoku puzzles may be considered more difficult than "medium" level puzzles because they have fewer clues, or starting numbers, which means that the solver must make more inferences and deductions to fill in the blank squares. Hard level sudoku puzzles may also have more complex patterns or symmetries than medium level puzzles, which can make them more challenging to solve.
On the other hand, medium level sudoku puzzles may have more clues, which can make them easier to solve in some ways. However, these additional clues can also make the puzzle more challenging because they provide more information that the solver needs to consider and keep track of. In addition, medium level sudoku puzzles may have fewer obvious patterns or symmetries, which can make them more challenging to solve.
Overall, the difficulty of a sudoku puzzle depends on a number of factors, including the number of clues, the complexity of the patterns and symmetries present in the puzzle, and the solver's own skill and experience. Both medium and hard level sudoku puzzles can be challenging, but hard level puzzles may require more advanced solving techniques and may be more time-consuming to complete.
How to solve a hard level sudoku grid?
Solving a hard level sudoku puzzle can be a challenging and time-consuming process, but with the right strategies and techniques, it is possible to complete even the most difficult puzzles. Here are some steps that you can follow to solve a hard level sudoku grid:
- Start with the given clues: Begin by filling in the squares that have a given number. This will give you a solid foundation to build on as you work through the puzzle.
- Look for easy clues: As you work through the puzzle, look for clues that are easy to spot. For example, if a particular row, column, or 3x3 grid only has one blank square remaining, you can fill it in with the missing number.
- Use advanced solving techniques: If you are having trouble making progress, try using advanced solving techniques, such as "naked pairs" or "hidden pairs," to eliminate incorrect possibilities and make it easier to solve the puzzle.
- Take breaks: If you find that you are getting frustrated or that you are making plenty of mistakes, take a break and come back to the puzzle later with fresh eyes. This can help you approach the puzzle with a clearer mind and may help you spot mistakes that you might have otherwise missed.
- Be patient: Hard level sudoku puzzles can be time-consuming to solve, and it may take several attempts to complete the puzzle. Don't get discouraged if it takes you a while to solve the puzzle, and remember that the process of solving the puzzle can be just as enjoyable as the final result.
By following these steps and using the right strategies and techniques, you can increase your chances of solving a hard level sudoku puzzle successfully. Remember to pay attention to the given clues, look for easy clues, and use advanced solving techniques if necessary. With patience and persistence, you can solve even the most challenging sudoku puzzles.
Why play hard level sudoku on Sudoku Academy?
There are several reasons why someone might choose to play hard level sudoku on Sudoku Academy, including: to challenge themselves and improve their problem-solving skills, to pass the time in a fun and enjoyable way, and to take advantage of the convenience and accessibility of an online platform.