OH COLL

COLL (corners of the last layer) is a group of Rubik’s Cube algorithms used as the second to last step. In the last layer, it requires that the edges to be properly oriented, and it will solve the orientation and permutation of the corners while retaining edge orientation. This leaves only EPLL, the edge-only cases of PLL (permutation of last layer) left to solve the cube.

Most cubers start with OLL and PLL (2H OLL, PLL) for last layer algorithms, and I would suggest you to tackle PLL first. However, you can use COLL into EPLL as an improvement whenever the edges are pre-oriented. If you use the ZZ method, COLL is all you get and thus essential.

There are technically 42 cases in COLL, but 2 are with the corners already oriented and thus just PLL. The algorithms are sorted into the 7 OLL cases, T, U, L, H, Pi, Sune, Antisune. I recognize them by the upper face stickers and how they match with each other and select side stickers. “Solid” means same color, “opposite” means colors from opposing faces (i.e. red/orange, blue/green), “mismatch” means colors from adjacent faces (e.g. red/blue, blue/orange).

Keep in mind that I us my right hand for one-handed cubing, so if you need to reflect them, please head on over to this algorithm translator.

recognition image algorithm comments
H columns coll-20 L' U2 L U L' U' L U L' U L the 2-gen case. double sune
H rows coll-19 z' U L2' U' D' L2' U L2' U' L2' U D L2' U' z a bad case. I might change this soon
H front solid coll-22 y L U L' U L U R' U L' U' R
H right solid coll-21 z' U L2' (U' L) D' L2' U L2' U' L2' U (D L') U' z a bad case. I might change this soon
Pi left solid coll-23 L' U2 L2 U L2 U L2 U2 L' the 2-gen case. wheel
Pi right solid coll-24 L' U' D L' (U' L) D' L2' U L U L2' U2 L'
Pi columns coll-25 y2 R U' L' U R' U L U L' U L
Pi checkerboard coll-26 y2 R U2' R' U L' U2' R U R' U' R U' R' L
Pi BL FR match coll-27 y' L' U2 L U L' U L2' (U' R' U) L' U' R alg's L' starts where sticker not solid
Pi BR FL match coll-28 y' R U2 R' U' R U' R2 U L U' R U L' alg's R starts where sticker not solid
T solid; side solid coll-1 R U2 R' U' R U' R2 U2 R U R' U R 2-gen
T solid; side opposite coll-4 x' z L' U2 L' D2' L U2 L' D2' L2 x
T opposite; matches with side coll-2 R U2' (R' U) (L U') R U L2 U l' x' (U' L) long
T opposite; side solid coll-3 (R' U) L' (U' L) R U2 L' U' L I use this for my distinctive single-finger double pushing
T mismatched; left side matches coll-5 x' U L D' L' (U' L) (D L') x traditional short algorithm
T mismatched; right side matches coll-6 y l' (U' L) U (R U') L' U x' traditional short algorithm
U opposite; front solid coll-7 R' U' R U' R' U2' R2 U R' U R U2' R' 2-gen. headlights
U opposite; checkerboard coll-9 L2 x' (D2' L) U2 L' (D2' L) U2 L x
U solid; front opposite coll-8 L D' L2 U L U L' U2 L2 (D L') a good case
U solid; front solid coll-10 R U' R' U R U' L U L' U z'y' L2' U L2' U2 the worst case. I learned some ZBLL
U mismatch; BL FR match coll-11 (L U') R U' L' U l' xz L2' U L' U' z alg's L starts where sticker matches front
U mismatch; BR FL match coll-12 (R' U) L' U R U' L U2' R' U R alg's R' starts where sticker matches front
L mismatch; FR stickers opposite coll-13 y' L' U2 L U L' U' L U L' U' L U L' U L 2-gen but long
L mismatch; FR stickers match coll-18 y' R U2 L' U L U2 R' L' U L
L solid; LF LB stickers mismatch coll-15 y L' U2 L' D' L U2 L' (D L2')
L solid; LF LB stickers opposite coll-16 z' U L2' U (R U') L2' U l' x'z L2'
L opposite; RF sticker matches FL coll-14 l' U z' U l' x' U' L' U l
L opposite; FR sticker matches BR coll-17 x U l' x' U' L U R U' L' x'

Even though I’ve included them, I do not use COLL for the Sune cases, as they’re not worth learning. They are the hardest to recognize, the bad cases are difficult to execute, and I can blindly perform sune in like 0.9 seconds and lead into PLL. There are just 21 PLL cases, and if you don’t know them already, they’re much more useful than the other 10 Sune COLL cases.

S opposites diag; FLU matches ULB coll-29 L U L' U L U2 L' 2-gen. sune
S opposites diag; FLU matches URF coll-31 L' U2 R U' L U R' U L' U L
S opposites col; RFU matches ULF coll-30 L U' R' U L2' (U2' R U' R' U2 R) L
S opposites col; RFU matches ULB coll-34 R' U2 R U2 L U' R' U R L'
S opposites row; LBU matches URF coll-32 L U' R' U L' U' R niklas
S opposites row; LBU matches ULF coll-33 R' L U L' U' R U2 L U2 L'
Si opposites diag; FRU matches URB coll-35 R' U' R U' R U2' R' 2-gen. antisune
Si opposites diag; FRU matches ULF coll-37 R U2 L' U R' U' L U' R U' R'
Si opposites col; LFU matches URF coll-36 R' U L U' (RR U2') L' U L U2 L' l' x'
Si opposites col; LFU matches URB coll-40 L U2 L' (U2' R') U L U' L' R
Si opposites row; RBU matches ULF coll-38 R' U L U' R U L' niklas
Si opposites row; RBU matches URF coll-39 L R' U' R U L' (U2' R' U2' R)
J perm, etc. coll-41 R' U L U' R U2' L' U L U2 L' just for thoroughness
Y perm, etc. coll-42 L2' U L U L' U x' U z U L' U L U R' U' just for thoroughness

Images courtesy of speedsolving.com

last updated Oct. 2013

med student, photographer, musician, runner, cuber