Sudoku is a logic puzzle game with numbers. To solve it, you will need to concentrate, as well as use logical thinking. The difficulty of Sudoku depends on the number of initially filled cells and on the methods that need to be used to solve it. Regular Sudoku gaming improve memory, mental clarity and slow the aging of brain cells.
The playing field is a 9x9 square, divided into smaller squares with a side of 3 cells. The goal of the game is to fill the empty cells with numbers from 1 to 9 so in each row, in each column and in each small 3 × 3 square, every number appears only once.