3x3 · ZBLL
3x3 ZBLL U 4 algorithm
3x3 ZBLL U 4 algorithm: 11 turns, opening with y R U. 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 4 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: R B B; R: L R B; B: U L U; L: L F F. The letters identify colors by their reference faces.
Execute the algorithm
y R U R2 D' R U R' D R2 U2 R'
The opening is y R U; the final segment is R2 U2 R'. This version contains 11 face, wide, or slice turns and 1 whole-puzzle rotation.