You can put consecutive numbers that connect horizontally, vertically, or diagonally. Features: - Over 900 puzzles of different size grids from easy to hard . All is free to play! - Each puzzle is well-designed that has an unique solution. - Free hints to help you when you are in trouble. - Save game progress automatically,you can continue to play each level anytime when you back. - Global leadership and achievement,challenge players all around world.