3x3 ZBLL L 4 algorithm

Solve the entire last layer in one sequence when its edges are already oriented.

ZBLL L 4 belongs to the L1 group in ZBLL.

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 top row left to right when facing that side gives F: F B L; R: U F F; B: R R U; L: R L L. The letters identify colors by their reference faces.

Execute the algorithm

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

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