OLL 51
The algorithm, how to recognise it and how to practise it without cheating.
Probability1/54
Moves10
TypeLines
Inverse and mirror—
Recommended algorithm
F U R U' R' U R U' R' F'10 moves
How to recognise it
Only the left and right edges are yellow on top. Headlights on the right; the left corners' yellow faces front and back.
Its inverse is another case
Do the 51 algorithm backwards, F R U R' U' R U R' U' F', and you are solving 48.
That's why CubeDojo never scrambles 51 that way: it builds a random state with the case fixed, so you practise 51 and not 48.
Practise 51 now
Random-state scrambles, a timer and spaced review. Free, on the web and on your phone.