Impossibles 1000pc Aww Sleeping Puppies. The next evolution of puzzles with a plus! The Impossibles Puzzles are 1000 piece jigsaws with added twists for the puzzler ready for a new challenge. No edges. A borderless puzzle means no straight edges to start from! 5 Extra pieces that do not fit anywhere in the puzzle to further the challenge. Repeating pattern lines and/or colors add another layer of complexity.