3x3 · CMLL
3x3 CMLL H Columns algorithm
3x3 CMLL H Columns 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.
H Columns belongs to the H 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: UF, UL, UB, UR. Reading each side’s upper corner stickers left to right when facing that side gives F: U U; R: L R; B: U U; L: R L. The letters identify colors by their reference faces.
Execute the algorithm
U R U R' U R U' 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.