3x3 CMLL Anti Sune X algorithm

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

Anti Sune X belongs to the Anti Sune group in CMLL.

Recognize this starting position

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

Execute the algorithm

U' R U2 R' U2 R' F R F'

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