Improve your skills with Sudoku Classic, the most popular number puzzle game for players who like to exercise their brain! Sudoku Classic for your smartphone or tablet is completely FREE and easy to learn. Object of the game is to fill the 9x9 grid with numbers. Each column, row and 3x3 block can contain the numbers 1 to 9 only once. Select your level of difficulty and choose between two input options for a comfortable game experience. All grids are generated randomly for hours of fun! Feature