F2L · Connected on top

F2L 17

R
U2
R'
U'
R
U
R'
How to recognise it
White on top, corner above the slot; the edge is beside it on the right, its top colour matching the corner's right sticker.
Algorithms
Relations
Mirror
F2L 18
Your algorithm backwards
R U' R' U R U2 R'
solves F2L 1
That's why your scrambles are never the inverse of the algorithm: you'd be practising F2L 1 without knowing it. CubeDojo builds a random state with this case and checks it comes out.
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