Aug 15, 2013 #15 cmhardw Premium Member. When forming the edges you only have a 50-50 chance of creating a cycle amongst those edges that has the same parity as the corner permutation. I understand the cause of OLL parity (and there are loads of good threads on here about it). Corner and dedge parity is measured by the outer-slice quarter turns required to place all corners and all dedges in their correct positions relative to the combined centers. This page will keep strong focus on reduction parity OLL parity and PLL parity cases, but it will 4x4x include a limited number of other parity situations which are also common in other solving methods, as well as cases which share some characteristics with reduction parity algorithms. Some useful algorithms/approaches for solving all PLL + Parity cases on even-layered cubes. 4x4 OLL Skip Trainer. PLL parity The PLL parity is caused during the edges step. For example, avoiding G perms and forcing good PLLs will make your last layer faster. This comes about because you have an odd number of two-piece swaps. PLL Parity Tricks. 240-4x4 PLL Parity-ENG.pdfDownload 4x4 PLL Parity-ENG.docxDownload In general: For solved corners, force U Perm if possible; advincubing said: Could someone explain what this means. PLL parity is the result of there being a difference (one being odd and the other being even) between (a) the corner parity state and (b) the dedge parity state. PLL parity is when you reach the PLL stage of a 4x4 and find that you have a case that isn’t one of the 21 cases that you know for 3x3 PLL. 3: Uw2 Rw2 U2 r2 U2 Rw2 Uw2. PLL Parity can be done in a few ways, and one of those ways tends to result in a better PLL + parity combination. But I don't understand the root cause of PLL parity on a 4x4. A guide to 4x4 PLL parity. The parity of the corner and edge permutation must be the same in … Joined Apr 5, 2006 Messages 4,106 Location Atlanta, Georgia WCA 2003HARD01. 4: (y) Rw2 U2 Rw U2 Rw2 U2 Rw2 U2 Rw U2 Rw2. 2: adj: 1 ⁄ 18 (R U R' U) [op1] (U R U' R') Free online speedcubing algorithm and reconstruction database, covers every algorithm for 2x2 - 6x6 including F2L, OLL, PLL, COLL, ZBLL, WV and much more Note that in some of the cases, an AUF (Adjustment of U Face) will be required between the PLL Parity Algorithm and a PLL … 4.2 OLL Parity + PLL Parity (Double Parity) 5 OLL Parity algorithms Which Don't Preserve the Last Layer 5.1 OLL Parity (Only) 5.1.1 1 Flip 5.1.2 3 Flip 5.2 OLL Parity + PLL Parity (Double Parity) 5.2.1 1 Flip 5.2.2 3 Flip 6 OLL Parity Algorithms Which Don't Preserve F3L 6.1 Just Corners are Permuted (Most are also Just FR F3L Slot Destroyers)