In this game, you are invited to play Sudoku. Feature of the game is that there is a mode in which numbers can be replaced with different monsters faces. Compared to the figures it will be easier, since in each row, column and box must be three red, three green and three blue icons. That will help visually identify what color is lacking in a particular situation. If you have not played Sudoku, then first try mode with numbers, so it will be easier to understand. Good luck!