# r2 - r slice problems?

Discussion in 'Blindsolving Discussion' started by kindard_, Jan 12, 2017.

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1. ### kindard_Member

16
3
Nov 20, 2016
I've got a case like this:

DFr needs to be swapped with UBr, and
DBr needs to be swapped with UFr.

r2 will solve everything right? No. It will also mess up the centers.

I need help. Thanks!

2. ### Scruggsy13Member

316
35
Dec 28, 2014
United States
WCA:
2014SCRU01
You've parity; the fix is D' L' F l' U2 l' U2 x U2 l' U2 r x' U2 r' U2 l2 F' L D

Edit: I can't read; ignore this

Last edited: Jan 12, 2017
3. ### Nam Dank the TankMember

47
2
Nov 12, 2016
I don't think that is parity. Parity is the r slice, after doing an r2 move, UBr and DFr are swapped. Doing the alg leaves UFr and DBr still swapped.

Using normal r2, you can shoot to UBr, reach the buffer. Then break into a new cycle: UFr > DBr > UFr.

r2 (r2 F RUR' d RU'R' d' F)*3

4. ### xyzzyMember

521
214
Dec 24, 2015
Some alternatives:

2U2 2F2 2R2 2F2 2U2 (not centre-safe)
z' M2 2U M2 2U2 M2 2U M2 2U2 z (centre-safe)
U' D' R2 U D 2R U' D' R2 U D 2R' (centre-safe)

Last edited: Jan 12, 2017
5. ### kindard_Member

16
3
Nov 20, 2016
Thank you! These were what I was looking for!