Please test the FREE version before buying. 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 - create your own TYPE of Jisaw Puzzles - enter your own grids for any type of puzzle - play or get the solution to the puzzles (solver). - on demand an EXE file to play on PC. You can pass the files between the PC version and the Android version Menu - NEW GAME - generates a new grid of the selected type - START PLAYING - defines the current position as initial position for the Solver - CHECK - verifies the current GRID status - RESTART GAME - clears all the values of the grid - SOLVE GRID - solves the grid. It indicates if the puzzle has multiple solutions - SAVE - saves to a file the current grid - LOAD / DELETE - loads a saved game (swipe on the item list to delete the file) - ENTER GRID - enter a new puzzle grid of the current type - GAME TYPE - NEW - enter a new type of puzzle (defines the regions) - CHANGE/DELETE - change the current type of puzzle by choosing in a list of existing ones (swipe to delete a model from the list) - SAVE - save the defined regions as a new type of puzzle Enjoy.