Impossibles Operation 750pc Puzzle. BePuzzled. The Impossibles Operation 750pc Puzzle will make your brain feel like it's playing a game of Twister. This puzzle is so challenging, it'll have you concentrating as if you were performing surgery on a real-life patient! With no edges and repeating patterns of Hasbro's nostalgic game, it's like trying to solve a puzzle while blindfolded and upside down.