2-look PLL
The final step in CFOP is PLL, or Permutation of Last Layer. Using the 2-look approach, permute (or position) the last layer pieces in two steps: Corners first, then edges. Only six algorithms are necessary, as described here.
Corners
Use these two algorithms to permute the last layer corners.
2-look PLL 1: Y-perm
Setup: F R U′ R′ U′ R U R′ F′ R U R′ U′ R′ F R F′
Solution: F R U′ R′ U′ R U R′ F′ R U R′ U′ R′ F R F′
Use this algorithm to swap two corners diagonally.
2-look PLL 2: J-perm
Setup: R U R′ F′ R U R′ U′ R′ F R2 U′ R′
Solution: R U R′ F′ R U R′ U′ R′ F R2 U′ R′
With headlights (correct corners) facing left, use this algorithm to swap the two adjacent corners on the right.
Edges
With the four last layer corners correct relative to each other, use the following algorithms to permute the last layer edge pieces.
2-look PLL 3: H-perm
Setup: M2 U M2 U2 M2 U M2
Solution 1: M2 U M2 U2 M2 U M2
Solution 2: M2 U′ M2 U2 M2 U′ M2
This algorithms swaps opposite edges.
2-look PLL 4: Z-perm
Setup: M′ U M2 U M2 U M′ U2 M2 U′
Solution 1: M′ U M2 U M2 U M′ U2 M2
Solution 2: U′ M′ U′ M2 U′ M2 U′ M′ U2 M2
This algorithms swaps edges diagonally.
2-look PLL 5: Ua-perm
Setup: M2 U M U2 M′ U M2
Solution: M2 U′ M U2 M′ U′ M2
With the bar (correct edge) in back, this algorithms cycles the remaining edges clockwise.
2-look PLL 6: Ub-perm
Setup: M2 U′ M U2 M′ U′ M2
Solution: M2 U M U2 M′ U M2
With the bar (correct edge) in back, this algorithms cycles the remaining edges counterclockwise.