Playing for a long time on www. Sudoku. Org. Uk I saw that I needed an application to help me check the puzzles and even more: generate new grids and new types of puzzles. The FREE application comes up with just a few TYPES of Jigsaw Puzzles. You can generate new unlimited GRIDS. You can play it or get the solution. In the PAID version: 20 types of puzzles already provided.