Sudoku is one of the most famous and best-known number puzzle games in the world. It has been played by millions of people for many years, and it’s no wonder it’s so popular!

It’s a straightforward game where you have to put numbers in a grid so that every row, column, and 3×3 section contains all the digits between 1 and 9. You don’t need to use complicated or advanced techniques, just simple addition, subtraction, multiplication, and division.

The first thing you need to do is to choose a difficulty level. There are four levels of difficulty: easy, medium, hard and expert.