3x3 · ZBLL
3x3 ZBLL U 12 algorithm
3x3 ZBLL U 12 algorithm: 17 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 12 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: F B R; R: B L R; B: U R U; L: B F L. The letters identify colors by their reference faces.
Execute the algorithm
y' R U' R' U R U R' U2 R' D' R U R' D R2 U R'
The opening is y' R U'; the final segment is R2 U R'. This version contains 17 face, wide, or slice turns and 1 whole-puzzle rotation.