(NR) U (NR)' U' (NR) U2 (NR)' – flips an edge piece.
Example: Yellow piece at F, row 3, col 5. Move it to U, row 3, col 5: 3F U 3F' U' – This moves that specific column’s piece up.
If you get hopelessly stuck, a or simulator can be a lifesaver. These tools allow you to input your current scrambled state and provide a move-by-move solution. They are excellent for: Identifying where you went wrong during edge pairing.
[6] GitHub repository: 7x7_solver (2026). Implementation source code and precomputed tables. DOI: 10.5281/zenodo.7894561 (example).