3x3 · PLL
3x3 PLL Nb algorithm
3x3 PLL Nb algorithm: 17 turns, opening with R' U R. Case recognition, the complete sequence, and practical execution notes.
Permute the last-layer pieces while preserving their orientation and the first two layers.
Nb belongs to the Opp Swap group in PLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: UFR, UFL, UBL, 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: F F B; R: L L R; B: B B F; L: R R L. The letters identify colors by their reference faces. Piece locations (position ← home piece): UFR ← UBL, UBL ← UFR, UL ← UR, UR ← UL.
Execute the algorithm
R' U R U' R' F' U' F R U R' F R' F' R U' R
The opening is R' U R; the final segment is R U' R. This version contains 17 face, wide, or slice turns and no whole-puzzle rotations.