3x3 · CMLL
3x3 CMLL Pi Columns algorithm
3x3 CMLL Pi Columns algorithm: 12 turns, opening with U' Rw 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 Columns 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: UB, UR. Reading each side’s upper corner stickers left to right when facing that side gives F: R U; R: L R; B: U L; L: U U. The letters identify colors by their reference faces.
Execute the algorithm
U' Rw U' Rw2 D' Rw U Rw' D Rw2 U Rw'
The opening is U' Rw U'; the final segment is Rw2 U Rw'. This version contains 12 face, wide, or slice turns and no whole-puzzle rotations.