Front view
Confirm the corner and edge form a connected 1×2 pair, their side colors match and the pair belongs in the front-right slot.
Basic paired insertion · Connected pair insert
F2L Case 1: recognition, algorithms and execution trainer
The corner and edge are already paired in the top layer and can be inserted into the right slot. This case establishes the clean pair-insertion motion used throughout intuitive F2L.
BeginnerLearning order #1Interactive 3D
Primary algorithm
U R U' R'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 F2L Case 1 from several angles
Right view
From the target side, the matching side stickers should form one continuous color block. This is the safest angle for verifying the pair is connected correctly.
Back view
Use center colors to identify whether the same pair can be inserted into a back slot without a y rotation.
Left view
The mirrored left-slot version should look structurally identical, with L moves replacing R moves and U direction reversed.
Algorithms
Primary and alternatives
Primary
U R U' R'Recommended starting point for reliable recognition and execution.
Left-slot mirror
U' L' U LUse when the paired pieces belong in the front-left slot.
Back-right insert
U' R' U RA rotation-free option when the target is the back-right slot and the pair is aligned for insertion.
Setup moves
Build the exact case
R U R' U'The inverse setup removes the solved front-right pair and places it in the top layer in the connected insertion state.
Finger tricks
Execute as one controlled phrase
- Begin in home grip and use the index finger that preserves the right hand for R.
- Move the pair over the target slot with U without separating it.
- Open the slot with R, restore U prime and close with R prime as one four-move phrase.
- Move your eyes away from the pair during the final R prime and locate the next corner or edge.
Common mistakes
What usually breaks the case
- Inserting a connected pair whose side colors do not match the target centers.
- Rotating the cube even though a left or back-slot mirror is available.
- Watching the pair all the way into the slot and creating a search pause afterward.
- Using the wrong U direction and moving the pair away from the target slot.
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
F2L Case 1 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
Beginner · recommended case #1
This is the foundational paired insert. Learn both right and left mirrors so an already formed pair never requires a cube rotation.
#1recommended order
Quick answers
Frequently asked questions
How do I know the pair is connected correctly?
The corner and edge touch as a 1×2 block and their side stickers match each other and the target centers.
Should I rotate for a left slot?
No. Learn the mirrored L-move insert.
When should I look for the next pair?
During the U R U’ R’ insertion, once the current pair’s path is automatic.
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