3x3 · COLL
3x3 COLL T 1 algorithm
3x3 COLL T 1 algorithm: 13 turns, opening with R U2 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 1 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: F F; R: R U; B: R L; L: U L. The letters identify colors by their reference faces.
Execute the algorithm
R U2 R' U' R U' R2 U2 R U R' U R
The opening is R U2 R'; the final segment is R' U R. This version contains 13 face, wide, or slice turns and no whole-puzzle rotations.