Professor's Cube
5x5x5
Inventor: Udo Krell in 1981.
Release: 1983 (Uwe Mèffert, Hong Kong)
Possible combinations: ~ 2,83 x 1074 (estimative of all uranium atoms in the observable universe: ~2 x 1074)
Instructions:
- To rotate the entire cube in space, simply click and drag on the gray background using your mouse or your finger if you're using a touchscreen device.
- To rotate specific layers of the cube, click and drag on the facelets of the desired layer in the direction you want to rotate it.