Introduction to COLL

COLL (Corners of Last Layer) is a subset of OLL.

• Prerequisite: All Edges are already oriented (The Cross is solved).
• Goal: Solve the Top Corners (Orientation) AND their Permutation (Placement) at the same time.

Why learn it?

• Normal OLL: Orients corners -> Leaves you with ANY of the 21 PLLs (including the bad ones like G-Perms).
• COLL: Orients corners + Permutes them -> Leaves you with only EPLL (Edge Permutation Last Layer).
  • EPLLs are the fastest PLLs: U-Perm, H-Perm, Z-Perm.
  • Result: You guarantee an easy finish.

Recognition

You recognize COLL by looking at the “Headlights” or matching colors on the top layer before you do the alg.

Example: The “H” Case

(Top has Cross, two headlights front, two headlights back).

• Standard OLL: R U R' U R U' R' U R U2 R' -> Gives random PLL.
• COLL (Columns Case): If the front two corners have the same side colors…
  • Alg: R U R' U R U L' U R' U' L
  • Result: Solved corners. You skip corner PLL.

There are about 40 COLL algorithms. It is a great step after you master full CFOP.