We present to you a very famous and popular Sudoku puzzle. In our version, you will see the classic version, but made in a colorful interface. The numbers are multi-colored, on the colored field they occupy a part of Protestantism, and you need to add the rest by filling in all the empty cells. The field has the dimensions of 9x9 cells, which in turn is divided into 3x3 squares. Numbers in cells must not be repeated. On the left you will see a digital set from which you will take numbers and transfer them to the field. If your choice is wrong, the number will not be set, you will be signaled from all sides that such a numerical value is already on the diagonal, vertical or horizontal. Sudoku Classic has four difficulty levels.