Weekend Sudoku 28 is one of the most popular puzzle games of all time. The goal of Sudoku is to fill a 9×9 grid with numbers such that each row, column, and 3×3 section contains all the digits from 1 to 9. As a logic puzzle, Sudoku is also a mind game great brain. If you play Sudoku daily, you will soon notice an improvement in your concentration and overall brain power. Start a game now.