F2L · Corner in the slot

F2L 30

R
U
R'
U'
R
U
R'
How to recognise it
Corner in the slot with white facing right; the edge is on the right of the top layer, its side sticker matching the right centre.
Algorithms
Built from
Sexy move + R U R'
Trigger
Sexy move
R U R' U'
Loose moves
R U R'
Relations
Mirror
F2L 29
Your algorithm backwards
R U' R' U R U' R'
solves F2L 27
That's why your scrambles are never the inverse of the algorithm: you'd be practising F2L 27 without knowing it. CubeDojo builds a random state with this case and checks it comes out.
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