OLL · Lightning bolts

OLL 12

M'
R'
U'
R
U'
R'
U2
R
U'
R
r'
How to recognise it
A small lightning bolt: the back and right edges with the back-left corner. The front-left corner's yellow faces you.
Algorithms
Built from
M' + Sune + U' R r'
Loose moves
M'
OLL 27 · Sune · backwards
Sune
R' U' R U' R' U2 R
Loose moves
U' R r'
Relations
Mirror
OLL 11
Your algorithm backwards
r R' U R' U2 R U R' U R M
solves OLL 5
That's why your scrambles are never the inverse of the algorithm: you'd be practising OLL 5 without knowing it. CubeDojo builds a random state with this case and checks it comes out.
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