Pyramorphix a.k.a. Figurenmatch, Distortion Demon Square Patented by Manfred Fritsche 1983. (left: shiny stickers 2007, other sides are red and green, plastic, 3.8" edges; right: Mefferts keychain purchased 2007, plastic, 2.25" edges) This puzzle is manipulated by turning along a cutting plane (the tips don't turn). It can be hard to