Step 5 of 6
Left and right edges
What you should end up with
The two edges with red and orange are in place, on the left and right on top, matching the corners. After that only the middle-slice edges are left. Guides call this step 4b, or UL/UR.
How to do it
- Find the two edges you need: the ones with red or orange. In the diagrams only they and the corners are in colour.
- The goal: bring both edges down into the middle slice. How depends on where they are now.
- When both are down, turn the top until the front corners show the colour opposite to the bottom front edge. If that edge shows red, the front corners are orange. Then do M2 and turn the top until the corners match the blocks.
- Orientation stays safe: a U move is harmless while the top centre is yellow or white, and M or M' is followed by U2 and another such move.
Bring both edges down
3D
M' U2 M'
3D
M' U2 M
3D
M2
Put them in place
3D
U M2 U'
3D
U' M2 U