3x3 · CMLL
3x3 CMLL O Diagonal algorithm
3x3 CMLL O Diagonal algorithm: 17 turns, opening with F 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.
O Diagonal belongs to the Solved group in CMLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: UFR, UFL, UBL, UBR. 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: F B; R: L R; B: B F; L: R L. The letters identify colors by their reference faces.
Execute the algorithm
F R U' R' U' R U R' F' R U R' U' R' F R F'
The opening is F R U'; the final segment is F R F'. This version contains 17 face, wide, or slice turns and no whole-puzzle rotations.