Notation for 4×4

Before learning 4×4 notation, review the 3×3 notation. The six sides of the 4×4 puzzle are the same as in the 3×3: L, R, D, U, F, and B.

This website uses a common 4×4 convention in which uppercase R means the outer right layer, lowercase r means only the inner layer beside it, and Rw means both layers together. To differentiate between outer (capitalized) and inner (lowercase) turns, screen reader users should configure audible announcement of capital letters.

Be aware that cube notation is not completely standardized. On some websites, lowercase r is used as an abbreviation for Rw. Always check a website’s notation before using its algorithms.

Outer layer turns are notated by the uppercase side letter. For example: this website notates right outer layer turns as R, R′, and R2.

Inner layer turns are notated by the lowercase side letter. For example: this website notates right inner layer turns as r, r′, and r2.

Double layer turns are indicated with an uppercase side letter followed by lowercase W. For example: this website notates right double layer turns as Rw, Rw′, and Rw2.

Whole cube rotations are as for the 3×3 puzzle.