3x3 · ZBLL
3x3 ZBLL L 42 algorithm
3x3 ZBLL L 42 algorithm: 15 turns, opening with y R U2. Case recognition, the complete sequence, and practical execution notes.
Solve the entire last layer in one sequence when its edges are already oriented.
ZBLL L 42 belongs to the L4 group in ZBLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: UFL, UBR. 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: L R R; R: U B R; B: B L U; L: L F B. The letters identify colors by their reference faces.
Execute the algorithm
y R U2 R' U2 R U R2 D' R U2 R' D R2 U2 R'
The opening is y R U2; the final segment is R2 U2 R'. This version contains 15 face, wide, or slice turns and 1 whole-puzzle rotation.