OLL · Dot
OLL 20
r
U
R'
U'
M2
U
R
U'
R'
U'
M'
1×
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I know it
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How to recognise it
Only the centre and the four corners are yellow on top, an X with no edges. Any angle works.
Algorithms
r U R' U' M2 U R U' R' U' M'
13 moves
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Your algorithm backwards
M U R U R' U' M2 U R U' r'
solves this same case
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