OLL · Corners done

OLL 28

r
U
R'
U'
r'
R
U
R
U'
R'
How to recognise it
All four corners and the back and left edges are yellow on top. The front and right edges show their yellow on the sides.
Algorithms
Relations
Your algorithm backwards
R U R' U' R' r U R U' r'
solves OLL 57
That's why your scrambles are never the inverse of the algorithm: you'd be practising OLL 57 without knowing it. CubeDojo builds a random state with this case and checks it comes out.
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