AlphaSheep
Member
These are called W perms, and there are two possible cases - Wa and Wb. I never remember which is which.I have also seen where I can get my edges into a zig zag pattern where they need to move in a way such as:
UF > UR > UL > UB > UF
One trick I like is to set up the four edges onto the M slice so you can cycle them in a single move. For example: F' L F R2 D' moves all four edges onto the M slice. You can then cycle them and fix parity in one move, then undo the setup moves. So the two cases are
F' L F R2 D' (M') D R2 F' L' F
F' L F R2 D' (M) D R2 F' L' F
An alg that's better suited to speed solving that I've never gotten round to learning is
M U' M' U2 F2 U' M2 U2 M U' F2
And then just replace all the U' moves with U moves to get the other case.