The 3x3x1 Edge is a simple one-layer puzzle designed to train you up so that you can take on more complex Cubes with ease.Enjoy the art of problem-solving everywhere, at home or on the go. This may be the easiest puzzle yet, but it’s still not a puzzle to take lightly.Rubik's Edge is an extension to the popular Rubik's Cube Range.Rubik's cube on one level.