Sudoku is one of the most popular puzzle games of all time. The object of Sudoku is to fill a 9 × 9 grid with digits so that each row, column and 3 × 3 square contains all numbers from 1 to 9. As a logic game, Sudoku is a game good for the brain. If you play Sudoku every day, you will soon start to see improvements in your concentration and brain capacity. Start a game now. In a short time, Sudoku is your favorite free online game.