This trick works best for the larger puzzles. Stack all the puzzle pieces on top of each other, it does not matter where. It does not have to be neat, but if it is too messy it will not be as accurate. Click "Save", then close the window. Go back to games and puzzles. Open up your saved puzzle. When you see your stack, it will be in order. All you have to do is place the pieces where they need to be.