3x3 · ZBLL
3x3 ZBLL Pi 21 algorithm
3x3 ZBLL Pi 21 algorithm: 11 turns, opening with y2 L' 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 Pi 21 belongs to the Pi 2 group in ZBLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: none. 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 R U; R: F L B; B: U F F; L: U B U. The letters identify colors by their reference faces.
Execute the algorithm
y2 L' U R U' L U' R' U' R U' R'
The opening is y2 L' U; the final segment is R U' R'. This version contains 11 face, wide, or slice turns and 1 whole-puzzle rotation.