3x3 COLL L 2 algorithm

Solve the last-layer corners with the last-layer edges already oriented; edge permutation may remain.

L 2 belongs to the L group in COLL.

Recognize this starting position

In the inverse-derived training position, the upper-face color points upward at these corner positions: UFL, 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 L; R: U F; B: R U; L: R L. The letters identify colors by their reference faces.

Execute the algorithm

R' U2 R' D' R U2 R' D R2

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