3x3 ZBLL T 42 algorithm

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

ZBLL T 42 belongs to the T4 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 F B; R: L R U; B: F B B; L: U L L. The letters identify colors by their reference faces.

Execute the algorithm

y' Lw U2 R D2 R' U2 R D2 R2 x

The opening is y' Lw U2; the final segment is D2 R2 x. This version contains 9 face, wide, or slice turns and 2 whole-puzzle rotations.