The V-Perm Puzzle: How to Solve One of the Rubik’s Cube’s Trickiest Permutations
If you have spent any time solving a 3×3 Rubik’s Cube, you have likely encountered the final hurdle: the Last Layer. After orienting all the edges and corners so that the top face is a solid color, you are often left with pieces that are out of order.
Enter the PLL (Permutation of the Last Layer) algorithms. While some permutations are straightforward swaps, others require finger gymnastics. Among the most dreaded—and fascinating—is the V-Perm.
What Exactly Is a V-Perm?
In the Fridrich (CFOP) method of speedcubing, the V-Perm is one of the 21 PLL algorithms. Its primary job is to swap two sets of corners and two sets of edges on the top layer without disrupting the orientation you worked so hard to achieve.
Visually, a V-Perm involves:
- A diagonal corner swap (swapping two corners that are kitty-corner from each other).
- An adjacent edge swap (swapping two adjacent edge pieces).
When you look at a cube undergoing a V-Perm, it often looks messy, but solving it brings a deeply satisfying completion to the puzzle.
Anatomy of the Algorithm
To solve a V-Perm efficiently, speedcubers rely on muscle memory and ergonomic finger tricks. Standard algorithms feature a mix of right-hand and left-hand triggers (like R U R’ and L’ U’ L).
One of the most popular and widely used standard V-Perm algorithms is:
$$R’ U R’ U’ y quad R’ F’ R_2 U’ R’ U quad R’ F R U’$$
Note: The $y$ denotes a cube rotation, and $R_2$ means turning the right face 180 degrees.
Another popular variation that avoids cube rotations (a “rotationless” V-Perm) is favored by advanced speedcubers for its smoothness:
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