3x3 · PLL
3x3 PLL Gc algorithm
3x3 PLL Gc algorithm: 15 turns, opening with R2 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.
Gc 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 B R; R: B L F; B: R R B; L: L F L. The letters identify colors by their reference faces. Piece locations (position ← home piece): UFR ← UBR, UBR ← UFR, UF ← UB, UL ← UF, UB ← UR, UR ← UL.
Execute the algorithm
R2 U' R U' R U R' U R2 D' U R U' R' D
The opening is R2 U' R; the final segment is U' R' D. This version contains 15 face, wide, or slice turns and no whole-puzzle rotations.