3x3 · COLL
3x3 COLL T 2 algorithm
3x3 COLL T 2 algorithm: 10 turns, opening with R' U R. Case recognition, the complete sequence, and practical execution notes.
Solve the last-layer corners with the last-layer edges already oriented; edge permutation may remain.
T 2 belongs to the T group in COLL.
Recognize this starting position
In the inverse-derived training position, the upper-face color points upward at these corner positions: UFR, UFL. Upper edges with that color facing up: UF, UL, UB, UR. Reading each side’s upper corner stickers left to right when facing that side gives F: B B; R: L U; B: F F; L: U R. The letters identify colors by their reference faces.
Execute the algorithm
R' U R U2 R' L' U R U' L
The opening is R' U R; the final segment is R U' L. This version contains 10 face, wide, or slice turns and no whole-puzzle rotations.