3x3 ZBLL U 13 algorithm

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

ZBLL U 13 belongs to the U2 group in ZBLL.

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

Execute the algorithm

R2 D' Rw U2 Rw' D R U2 R

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