6x6x6 Last two edges — inner wings — Big-cube parity

Big-cube parity on the 4x4x4 to 7x7x7. The algorithm is 2U' R U R' F R' F' R 2U — 9 moves. A 6x6 has two wing slices per edge; this pairs the inner pair, the way the 5x5 inner case does. This algorithm moves 20 edge pieces and 5 corners — fine during pairing, before the 3x3 stage.

The algorithm

2U' R U R' F R' F' R 2U. Read it as the cube faces you: U is the top face, R the right, F the front. A prime (') is anticlockwise, a 2 is a half turn, a lower-case or w-suffixed letter turns two layers.

When it applies

Edge pairing. A 6x6 has two wing slices per edge; this pairs the inner pair, the way the 5x5 inner case does. This algorithm moves 20 edge pieces and 5 corners — fine during pairing, before the 3x3 stage.

How it is checked

Every algorithm on this site is applied to a real model of its cube in the test suite and asserted to solve its case and touch nothing else. It was proved, not proofread. Practise it from the timer, or add it to a printable sheet.