Challenge yourself with Sudoku puzzles in multiple grid sizes. All of Sudoku comes with 4 different grid sizes: - 4x4, for younger players to learn - 6x6, for quick games - 9x9, traditional Sudokus with different difficulty levels - 16x16, little more extreme challenges with larger grid Sudoku is classic Japanese logic game where you need to fill the play grid with correct numbers following just few simple rules: - Each row can contain certain number only once - Each column can contain certain number only once - Each larger cell block can contain certain number only once Each Sudoku has only one solution and on each size there is difficulty levels easy, medium, hard and expert. All of Sudoku has also some assist functions to make game play more smoother if you want to use them: - Notes to help solving complicated situations - Highlight same column, row and cell block - Show how many times each number is set - Highlight same numbers in the grid - Use hints in case you cannot get forward - Constant checking if you have set correct number You can play the game in landscape or portrait mode on every device. Also you can choose your color theme for the background from 10 different choices. For 16x16 game there is zoom possibility if needed.