3x3 · ZBLL
3x3 ZBLL U 1 algorithm
3x3 ZBLL U 1 algorithm: 15 turns, opening with R U' R'. Case recognition, the complete sequence, and practical execution notes.
Solve the entire last layer in one sequence when its edges are already oriented.
ZBLL U 1 belongs to the U1 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: B B L; R: F L L; B: U R U; L: F F R. The letters identify colors by their reference faces.
Execute the algorithm
R U' R' U' R U2 R' U' R' D' R U2 R' D R
The opening is R U' R'; the final segment is R' D R. This version contains 15 face, wide, or slice turns and no whole-puzzle rotations.