Front view
Look for one solved 1×3 bar and the opposite headlights. The remaining adjacent corner-edge pair is the swap that gives the case its T-perm identity.
Adjacent-swap PLL · PLL T
T-Perm: recognition, algorithms and execution trainer
T-perm is a common first full PLL: a friendly RUF sequence, a clear solved bar and recognition cues that transfer to other adjacent-swap cases.
EasyLearning order #1Interactive 3D
Primary algorithm
R U R' U' R' F R2 U' R' U' R U R' F'Time an execution ↓Interactive demonstration
Inspect and play the case from four angles
Change the viewpoint without changing the case. Then play the selected algorithm turn by turn.
Viewing angle
Algorithm
Recognition
Recognize T-Perm from several angles
Right view
From the side, confirm the solved bar wraps correctly and that the opposite face has matching corner stickers rather than a second complete bar.
Back view
The solved bar is easiest here when it sits behind. Practice recognizing the opposite headlights without turning the cube around first.
Left view
Use color opposites to confirm the adjacent swap. This prevents confusion with Jb when only one visible block is considered.
Algorithms
Primary and alternatives
Primary
R U R' U' R' F R2 U' R' U' R U R' F'Recommended starting point for reliable recognition and execution.
Left-hand mirror
L' U' L U L F' L2 U L U L' U' L FUseful as a mirror drill or when the case is approached from the opposite grip.
Back-angle execution
y2 R U R' U' R' F R2 U' R' U' R U R' F' y2Avoids a separate recognition rotation when the solved block is already at the back.
Setup moves
Build the exact case
F R U' R' U R U R2 F' R U R U' R'T-perm is self-inverse, so the setup and solution share the same move structure. Apply the setup to solved and add a random U rotation for recognition training.
Finger tricks
Execute as one controlled phrase
- Start with R U R' U' in home grip; keep the right thumb on the front.
- Use R' F as a connected transition, then execute R2 with controlled wrist alignment.
- Continue U' R' U' R U R' with alternating U flicks and no mid-algorithm regrip.
- Finish F' and predict AUF before the final face settles.
Common mistakes
What usually breaks the case
- Confusing T-perm with Jb-perm when the solved bar is viewed from the wrong side.
- Losing the R-prime to F transition and starting the R2 from an unstable grip.
- Pausing after R2 because the second half was memorized as a separate algorithm.
- Stopping after the permutation without including final AUF in full-solve practice.
Execution-time trainer
Time repeatable executions, not one lucky run
Apply the setup, press the timer button or Space to start, then press again when the algorithm is complete. Times are stored locally; signed-in attempts also contribute privately to aggregate statistics.
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Short demonstration video
T-Perm in one quick visual pass
Use the clip for a compact overview, then return to the interactive 3D player to control angle and playback.
Difficulty and order
Easy · recommended case #1
T-perm is a strong first full PLL after two-look coverage. It is common, self-inverse and teaches a reusable RUF cadence.
#1recommended order
Quick answers
Frequently asked questions
Is T-perm self-inverse?
Yes. Executing T-perm twice returns the cube to the original state, aside from AUF handling.
What are the main recognition cues?
One solved bar, opposite headlights and the adjacent corner-edge swap.
Why learn T-perm first?
It is common, finger-trick friendly and introduces patterns used by several other PLL algorithms.
Put recognition under pressure
Mix this case into a real training session.
Use SupaKewber's algorithm trainers and smart-cube solve analysis to see whether isolated execution transfers into full solves.
Open the trainer