PLL: diagonal corner swaps

Goal

Solve the top layer with one algorithm when two diagonal corners need to swap.

How to recognize it

No side has headlights. Every side has a pair on the same side: Na or Nb. Only two pairs meeting at one corner: V perm.

Y perm also belongs here and is in 2-look PLL: corners.

How to hold the cube

White face on the bottom, top already all yellow. Each case's grip is shown under the controls. The player adds a U at the start or end when needed.

The main idea

Na and Nb mirror each other. The Na algorithm is one half done twice, so you only need the first half (Nb's alternative works the same way).

Next lesson

Go to PLL: G perms.