jperm is an algorithm that swaps two sets of adjacent corners and edges. It is one of the most well-known algorithms and is often used by beginner cubers. It is also the basis for most speedsolving methods.
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It’s a PLL
In cubing, PLL stands for Permutation of the Last Layer and is a critical step in many speedsolving methods. It is a set of algorithms that swaps the last layer corner and edge pieces to their solved positions. Beginner PLL (2-look PLL) is a subset of the complete set and contains two algorithms for corners and four for edges. The corner algorithms are quite long and can be difficult to memorise, but the edge algorithms are short and can be memorised more easily.
A J-perm swaps two adjacent corners and two adjacent edges on the last layer. This creates an odd permutation that cannot be undone with commutators (which only affect even and odd permutations). This is why it takes an odd number of quarter turns to execute, which is not the same as the ABA’B’ technique used in commutators. It is also not the same as the move sequences that speedsolvers use, which are optimised for speed and often hard to understand.
The j perm is an easy PLL algorithm because it swaps two adjacent corners and edges in the last layer. It also has an odd number of quarter turns that need to be changed, but you can solve that with commutators alone. It’s also a great algorithm to use for learning about commutators, since it uses one of the easiest methods for doing so. If you’re interested in learning more about j perm, check out u/paperplateparty’s YouTube channel! He has a lot of great content to offer. You can also visit his blog for more information. Thanks for reading! – Dylan Wang / u/paperplateparty.
Dylan Q Wang, known online as J Perm, is a Canadian speedsolver with two national records (tied FMC single and FMC average). He is sponsored by the Cube Retailer SpeedCubeShop and has over 700,000 YouTube subscribers. He is known for his tutorials and videos about Rubik’s Cube.
The j perm method is fast because it swaps adjacent edges and corners in the last layer. This means you don’t need to do a lot of complicated move sequences. It’s also very quick to do because it only requires an odd number of quarter turns. It can be faster than other algorithms that require an even number of quarter turns because they need to change the parity of the corner or edge permutation twice. This makes it hard to understand if you don’t know how the actual move sequences are done by speedsolvers.
Dylan Q. Wang, better known online as J Perm, is a cubing YouTuber who is well-known for his Rubik’s Cube related videos. He currently holds two national records in FMC and FMC average. J-perm is an extremely fun puzzle that allows you to do lots of cool things with the cube. The move sequence that speedsolvers use for j perm is usually incomprehensible, as they have been optimised for speed and found by computer. However, the general concept is quite simple.