4x4 | Parity Algorithms All OLLPLL OLL Categories All OLL PLL Cases: 24x4 parity occurs on the last layer of a 4x4, where you get a case that is impossible to get on a 3x3 so you need a specific algorithm to solve it. OLL Parity2 r', U2, l, F2, l', F2, r2, U2, r, U2, r', U2, F2, r2, F2 OLL Parity1 Rw U2, X, Rw U2, Rw U2 , Rw' U2, Lw U2, Rw' U2, Rw U2, Rw' U2, Rw'Rw' U2' Rw U2 Rw U2' Rw2' F2 Rw' U2 Rw' U2' F2 Rw2 F2