# Notation

## SSE 2x2

The SSE 2x2 (Superset ENG) is a notation for cubes with 2 layers, such as the Pocket Cube. The notation is based on the English language. It supports 90° and 180° twists of the faces of the cube. A whole cube can be rotated along its face axes. Permutation and orientation changes of individual cube parts can be specified using permutation cycles.

### Face twists: R, R', R2

Move Right Up Front Left Down Back
○● +90° R U F L D B
○● -90° R' U' F' L' D' B'
○● +180° R2 U2 F2 L2 D2 B2

Clockwise 90° twists of the six faces of the cube are described by the capital letters: R, U, F, L, D and B, (right, up, front, left, down, back). For example, R rotates the right face in clockwise direction as seen from the right face.

Counterclockwise twists and rotations are described by appending the inversion operator ' to a move: R', U', F', ...

In environments, where the ' character can not be used, the character - can be used as an alternative inversion operator.

180° twists and rotations are described by appending the number 2 to a move: R2, U2, F2, ...

### Cube rotations: CR, CR', CR2

Move Right Up Front Left Down Back
●● +90° CR CU CF CL CD CB
●● -90° CR' CU' CF' CL' CD' CB'
●● +180° CR2 CU2 CF2 CL2 CD2 CB2

Rotations of the whole cube are described by prepending the letter C to a face twist. For example, CR rotates the whole cube in clockwise direction as seen from the right face.

### Grouping

Sequences of moves can be grouped using brackets: (R U F).

### Repetition

Moves and groups can be repeated multiple times by appending the number of repetitions to the closing bracket: (R U F)3.