3x3 · PLL
3x3 PLL Ab algorithm
3x3 PLL Ab algorithm: 9 turns, opening with x R2 D2. Case recognition, the complete sequence, and practical execution notes.
Permute the last-layer pieces while preserving their orientation and the first two layers.
Ab belongs to the Adj 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 R; R: B R B; B: L B F; L: R L L. The letters identify colors by their reference faces. Piece locations (position ← home piece): UFR ← UBR, UBL ← UFR, UBR ← UBL.
Execute the algorithm
x R2 D2 R U R' D2 R U' R x'
The opening is x R2 D2; the final segment is U' R x'. This version contains 9 face, wide, or slice turns and 2 whole-puzzle rotations.