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PLL Nb

The algorithm, how to recognise it and how to practise it without cheating.

Probability1/72

Moves17

TypeDiagonal swap

Inverse and mirrorNa

Recommended algorithm

R' U R U' R' F' U' F R U R' F R' F' R U' R

17 moves

How to recognise it

Looking straight at any side, its left two stickers form a block and its right corner is the opposite colour. Any angle works.

Practise Nb now

Random-state scrambles, a timer and spaced review. Free, on the web and on your phone.

Other cases: Diagonal swap

Ex' R U' R' D R U R' D' R U R' D R U' R' D' xDiagonal swap · 1/36 NaR U R' U R U R' F' R U R' U' R' F R2 U' R' U2 R U' R'Diagonal swap · 1/72 VR' U R' U' R D' R' D R' U D' R2 U' R2 D R2Diagonal swap · 1/18 YF R U' R' U' R U R' F' R U R' U' R' F R F'Diagonal swap · 1/18