Naming the Pieces

Every small cube — a piece — is named by the faces it touches, in a fixed order: U/D first, then F/B, then R/L.

An edge touches 2 faces: UF, FR, DL, BL
A corner touches 3 faces: UFL, DBL, DRB

Click a name to see exactly which piece it is. Remember the order: U/D → F/B → R/L. So we write UF, never "FU".