3x3 CMLL U Down Slash algorithm

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

U Down Slash 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, UL, UB, UR. Reading each side’s upper corner stickers left to right when facing that side gives F: F R; R: B L; B: U U; L: F L. The letters identify colors by their reference faces.

Execute the algorithm

R2 D' R U2 R' D R U2 R

The opening is R2 D' R; the final segment is R U2 R. This version contains 9 face, wide, or slice turns and no whole-puzzle rotations.