Hard Sudoku puzzles

Difficult Sudoku is for advanced players!

Hard Sudoku is characterized by the fact that cells contain much fewer numbers than simple or medium ones. To solve hard level Sudoku puzzles, you should already know some tactics and tricks.

Popular methods and techniques for solving hard web Sudoku

Print difficult Sudoku and use different colors and symbols to solve it. This way, you can track whether certain numbers have already been used with color. Symbols can mark solutions based on others.

You can also use the online notes feature on Sudoku.com. This way, you can first check whether you are moving in the right direction when solving hard Sudoku puzzles.

In addition, there is a “double” tactic. This tactic is characterized by the fact that in a row, column, or in a small square, you can still place only two possible numbers. But you do not know which one to put. The idea is that you make a mark about it and exclude it from further decision. This reduces the number of options to solve, and it becomes easier to solve the puzzle. The same can be done for three digits. This tactic is called a “triplet” or “triple”.

Pros of playing hard web Sudoku puzzles

The advantages of free web difficult Sudoku puzzles are obvious. Sudoku puzzles are always available on your smartphone. In addition, the Sudoku.com website has useful features, such as tips, notes, eraser, delete function. Solving puzzles becomes much easier with such tools. Some time and effort - and you will become a professional in the Sudoku game soon!