Sudoku is one of the most popular puzzle games in history. The goal of Sudoku is to fill a 9×9 square grid with numbers, so that each row, each column and section of 3×3 squares contains all the numbers from 1 to 9. A logic puzzle, Sudoku is also an excellent brain training game. By playing Sudoku every day, you will quickly see improvements in your concentration and the power of your brain, you solicit your reasoning faculties, your intellectual capacities are then reinforced. The goal is to fill grids as quickly as possible.