Z
The algorithm, how to recognise it and how to practise it without cheating.
Probability1/6
Moves14
TypePermute the edges
Inverse and mirror—
Recommended algorithm
M' U M2 U M2 U M' U2 M214 moves
How to recognise it
Headlights on all four sides, each with an adjacent colour between them. Hold it so the front edge has the colour of the left side's headlights.
Practise Z now
Random-state scrambles, a timer and spaced review. Free, on the web and on your phone.