Sudoku classic is a logic-based, combinatorial number-placement puzzle game. You need to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids that compose the grid contains all of the digits from 1 to 9 to win the game. FEATURES: - Different difficulties ( Easy - Normal - Hard ) - Hundreds of puzzles for each difficulty - Pencil - Hint - Erase - Timer - Clean interface and smooth controls Download Now Sudoku Plus for free.