3x3 CMLL Sune X algorithm

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

Sune X belongs to the Sune group in CMLL.

Recognize this starting position

In the inverse-derived training position, the upper-face color points upward at these corner positions: UFR. Upper edges with that color facing up: UF, UL. Reading each side’s upper corner stickers left to right when facing that side gives F: B F; R: R U; B: R U; L: L U. The letters identify colors by their reference faces.

Execute the algorithm

U L' U2 L U2 Rw U' Rw' F

The opening is U L' U2; the final segment is U' Rw' F. This version contains 9 face, wide, or slice turns and no whole-puzzle rotations.