Professor Square-1A five-layered version of the Square-1 puzzle. With additional slices: 20 instead of 12.
Proxy Cube (Mercury)In essence, a shape mod of a Crazy X-Cube. The first of the Proxy Fisher series.
PuckubeA puck heavily extended into a hexahedrons shape.
PycubroA Pyraminx with heavy extensions and a batch of additional volume to give it a true cubic shape.
PyracueA Skewb variation built by Hiroshi Ishino and presented by Katsuhiko Okamoto.
Quirky CubeA puzzle which reminds one of the Square-1 but introduces a whole set of changes to the original set.
Radio Cube 3A Radiolarian 3 (a face-turning icosahedron) redesigned to have the shape of a cube.
Rainbow MirrorborgA Bump Cube (aka Mirror Blocks) transformed like a Borg Cube. Small colored bits are added.
RB Square-2The concept of the "Marcos Square-1" applied to a Square-2: A Square-2 in midturn transformed back into cubic shape.
Rex Ghost CubeThe concept of the Ghost cube applied to the Rex cube. This time with differently coloured stickers.