3x3 · CMLL
3x3 CMLL L Back Commutator algorithm
3x3 CMLL L Back Commutator algorithm: 10 turns, opening with U R' U2. Case recognition, the complete sequence, and practical execution notes.
Solve the four upper corners in Roux after building both side blocks; the remaining edges are solved later.
L Back Commutator belongs to the L group in CMLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: UFR, UBL. Upper edges with that color facing up: UF, UL, UB, UR. Reading each side’s upper corner stickers left to right when facing that side gives F: R L; R: F L; B: U F; L: R U. The letters identify colors by their reference faces.
Execute the algorithm
U R' U2 R' D' R U2 R' D R2
The opening is U R' U2; the final segment is R' D R2. This version contains 10 face, wide, or slice turns and no whole-puzzle rotations.