3x3 CMLL U Upper Row algorithm

Solve the four upper corners in Roux after building both side blocks; the remaining edges are solved later.

U Upper Row belongs to the U 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. Upper edges with that color facing up: UF, UB. Reading each side’s upper corner stickers left to right when facing that side gives F: F B; R: L B; B: U U; L: F L. The letters identify colors by their reference faces.

Execute the algorithm

U' F R U R' U' F'

The opening is U' F R; the final segment is R' U' F'. This version contains 7 face, wide, or slice turns and no whole-puzzle rotations.