OLL parity: one flipped edge
Flip the top-front edge pair, nothing else moves.
- You start with (input)Solve it like a 3x3
- Result you will get after finishing this stepOLL parity: one flipped edge
How to do it
- At step 4 of the 3x3 guide (yellow cross), a 3x3 always has 0, 2 or 4 top edges with yellow facing up. Count 1 or 3 and one pair is flipped: that is OLL parity, a normal 4x4 thing.
- Yellow on top. Turn until a pair with yellow on its side (not on top) is at the front, then do the formula. Then carry on with the yellow cross as usual.
This step: look only for
- Piece
- Edge pairs
- Colours
- A pair with yellow on its side (not on top)
- Where
- Layer 3 (the top)
- How many
- All 4 pairs at once
Leave every other piece alone for now: the pictures show them in grey. Found one? Compare it with the cases below.
Which case do you have?
Before you compare and all through the formula: keep the front (the face marked FACING YOU in the pictures) turned towards you. A picture marked BACK, AWAY FROM YOU looks from behind: do not turn the cube, just tilt it to see the back.
2R2B2U22LU22R′U22RU2F22RF22L′B22R2
- A long formula: go slowly and count each turn.