Sudoku is a popular board game for android, where you will fill free cells with numbers. In this game in front of you will be a large square divided into several small squares, which are filled with a small number of digits. Your task will be to place one digit in each cell so that in a small square of 3 * 3 it meets once. Solve difficult puzzles and fill the whole square with numbers. The complexity of the game will gradually increase with the addition of more numbers initially. In total, the game features 1500 puzzles and more than 5 difficulty levels.