Nb perm

Nb perm

17 moves · 1 in 72 solves

The case · press play

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Practise this case

Set it up

Hold a solved cube yellow on top, green in front, and do:

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

How to spot it

Every side shows a 2×1 block at its left-hand end.

Na permIts mirror