Pair the edges
Join each middle edge with its two wings, centres untouched.
- You start with (input)The four side centres
- Result you will get after finishing this stepPair the edges
Which case do you have?
Uw′DwRUR′UwDw′
Keep the front
Before you compare and all through the formula: keep the front (the face marked FACING YOU in the pictures) turned towards you. A picture marked BACK, AWAY FROM YOU looks from behind: do not turn the cube, just tilt it to see the back.
How to do it
- Each edge of a 5x5 has 3 pieces: a middle edge and two wings beside it. Three pieces with the same two colours make an edge group. This step makes the first 10.
- Move pieces only with outer faces (, , , , , ): they never break a centre.
- Both wings at once: the middle edge in the front-right edge, both wings in the front-left edge (one top half, one bottom half). Turn until the top-right edge is unpaired, then do picture 1.
- One top-half wing missing: put it in the top half of the front-left edge and do picture 2.
- An edge the wrong way round: bring it to front right and flip it with picture 3.
This step: look only for
- Piece
- Middle edges and wings
- Colours
- Three pieces with the same two colours
- Where
- Anywhere on the cube
- How many
- 10 groups, one at a time
Leave every other piece alone for now: the pictures show them in grey. Found one? Compare it with the cases below.
- Two edges left? Go to step 5.