## What causes 4×4 parity?

So when you have a 4x4x4 parity case, you actually just have a mirrored 5x5x5 edge, or incorrectly placed some 5x5x5 edges. They may not be visible, and even if they were visible (but without stickers) they may not have a clear orientation, they are still the cause of the 4x4x4 parities.

## What is the 4×4 parity ALG?

4×4 parity occurs on the last layer of a 4×4, where you get a case that is impossible to get on a 3×3 so you need a specific algorithm to solve it. OLL parity specifically occurs because two adjacent edge pieces are flipped, but generally you can’t recognize it until you are at the OLL stage of solving.

How do you memorize OLL parity?

Just a wide R move followed by a U2 move. There are no primes ‘/counterclockwise moves. This is the base for the other moves. Just like the first one but the the U2 is counterclockwise so U2’…Easy way to memorize 4×4 OLL Parity.

Number Moves Symbol
2 Rw U2′ B
3 Rw’ U2 C
4 Lw U2 D
5 Rw’ U2′ E

### What causes OLL parity?

OLL parity is measured by the number (QTM) of inner-layer turns that occur when forming the reduced centers. If the number of quarter inner-layer turns (of the scramble + the solution to solved centers) is odd, there will be OLL parity.

### What is RW on a 5×5?

When you see ‘Rw’ this indicates to move both of the right most layers in either a clockwise or anti-clockwise rotations. When you see ‘Lw’ this indicates to move both of the left most layers in either a clockwise or anti-clockwise rotations.

What are the different types of parity in NXN?

The main types of Parity are OLL and PLL Parity for NxN twisty puzzles. It is important to note that these parities can ONLY occur on even layered cubes (4×4, 6×6 etc.) and never on odd layered cubes (3×3, 5×5 etc.).

#### When do you need to pair edge sets in Rubik?

The problem is that we no longer have a third unmatched pair to realign the centres with. So you will need to learn the next algorithm to pair the last two unpaired edge sets. When the last two pairs are not matched. This and the two following algorithms have been placed on the page 4x4x4 Disparity Algorithms for quick reference in the future.

#### Is there such a thing as pseudo parity in a cube?

One type of pseudo-parity is edge parity. For even layered cubes, this isn’t technically a parity at all, but it still requires an extra “algorithm” to solve, even though it is very short and just involves using the same moves you do to solve the rest of the edges, but in a different order. It happens when all but two edges are solved.

When to use speedcubers to solve PLL parity?

However, most speedcubers solve PLL parity as soon as they recognise it, which is when OLL has been completed and any OLL parity has been dealt with. The best way to spot PLL parity is when you see a PLL case that is impossible to get on a 3×3 cube. One of the best examples for this is the pseudo-T permutation.