3x3 · CMLL
3x3 CMLL Pi Left Bar algorithm
3x3 CMLL Pi Left Bar algorithm: 12 turns, opening with U' R' U'. 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.
Pi Left Bar belongs to the Pi group in CMLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: none. Upper edges with that color facing up: UL, UR. Reading each side’s upper corner stickers left to right when facing that side gives F: R U; R: F F; B: U L; L: U U. The letters identify colors by their reference faces.
Execute the algorithm
U' R' U' R' F R F' R U' R' U2 R
The opening is U' R' U'; the final segment is R' U2 R. This version contains 12 face, wide, or slice turns and no whole-puzzle rotations.