Edge Orientation

The orientation of edges of the cube, often only EO (edge orientation). Methods such as Roux (6 edges), ZZ (all edges), and Petrus (7 edges) include this as a substep. Also other puzzles such as the Square-1 have EO as a common sub step (EO on a Square-1 is more precisely a separation of edges to the correct layers but it is always referred to as edge orientation.)

See also