4-Look Last Layer

Completing the last layer using four steps or 'looks'. It is generally broken down into 2-look OLL (orientation of edges, followed by orientation of corners) and 2-look PLL (permutation of corners, followed by permutation of edges). Achieving 4LLL requires knowledge of 17 algorithms or 14 excluding mirrors. While progressing from 4LLL to 2LLL a speedcuber will typically learn all 21 PLLs first to achieve a 3-look last layer. Eventually learning the final 57 OLL cases will achieve the 2-look last layer used in full Fridrich.

2-Look OLL

• Step 1: Orientation of Edges. This requires the use of 3 algorithms. One to flip adjacent edges, one to flip opposite edges and a third to flip all four edges.
• Step 2: Orientation of Corners. (AKA OCLL) Requires the use of 7 algorithms (6 excluding mirrors), to solve the T, Bowtie, Headlights, Sune, Anti-Sune, H and Pi cases.

2-Look PLL

• Step 1: Permutation of Corners. Requires 3 algorithms (2 excluding mirrors), to carry out (1) clockwise 3-corner cycle (A-perm), (2) anticlockwise 3-corner cycle (A-perm b), (3) diagonal corner swap (any of Y-Perm, E-Perm, N-Perm, ...

• Step 2: Permutation of Edges. Uses 4 algorithms (3 excluding mirrors), (1) clockwise 3-edge cycle (U-perm a), (2) anticlockwise 3-edge cycle (U-perm b) (3) opposite edges swap (H-Perm), (4) adjacent edges swap (Z-Perm)

External Links

• cubefreak.net 4 Look Last Layer