4x4x4 parity algorithms

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Parity (also known as Orientation Parity and Permutation Parity) on the 4x4x4 is a common situation (occurring in 3/4 of all solves) where two or four edge pieces need to be cycled. This is considered difficult because in most methods the centers are solved before the edges, and there is no efficient or intuitive way to swap those edges (and no others) without affecting the centers. Because of how common and difficult this case is, many algorithms have been developed. This page attempts to list all efficient algorithms.

Impure Edge Flips (OLL Parity)

Impure Edge Flips (Only for Reduction) (WCA notation)

Alg Rw U2 x Rw U2 Rw U2 Rw' U2 Lw U2 Rw' U2 Rw U2 Rw' U2 Rw'
Alg Rw U2 Rw U2 Rw' U2 Rw U2 Lw' U2 Rw U2 Rw' U2 x' Rw' U2 Rw'


Impure Edge Flips which can be made pure edge flips.

  • If the remaining algorithms in this category are executed using WCA notation, pure flips will result.
Frédérick_Badie(v1) r' U2 l F2 l' F2 r2 U2 r U2 r' U2 F2 r2 F2 /(25,15)
Frédérick_Badie(v2) r' U2 x l U2 l' U2 x' r2 U2 r U2 r' U2 F2 r2 F2 /(25,15)
Alg r2 B2 U2 l U2 r' U2 r U2 F2 r F2 l' B2 r2 /(25,15)
cmowlaparity x' r2 U2 l' U2 r U2 l F2 U r U' F2 U r' U r2 x /(23,16)
lucasparity r U2 r U2 r' U2 r U2 l' U2 l F2 r' F2 r' U2 r' /(25,17)
Alg r2 U2 l' U2 r U2 r' U2 r U2 r' x' U2 r' U2 r2 F2 l x /(27,17)
Alg r U2 r U2 r' U2 r U2 l' U2 r U2 r' U2 l r2 U2 r' /(27,18)


Algorithms that solve OLL and PLL Parity Simultaneously (Double Parity):

Alg Rw2 B2 Rw' U2 Rw' U2 x' U2 Rw' U2 Rw U2 Rw' U2 Rw2 U2 (x)
Alg Lw' U2 Lw U2 Lw' U2 Lw' U2 Rw U2 Lw' U2 Lw U2 x' U2 Lw2


Pure Edge Flips:

cmowlaparity x' Rw2 U2 Lw' U2 r U2 Rw U2 x' U r U' F2 U r' U Rw2 x /(23,16)
Alg x' Rw2 U2 Lw' U2 r U2 Rw U2 x' U' r U F2 U' r' U' Rw2 x /(23,16)
Alg Rw Uw2 x' U D r y Uw2 Rw2 Uw r Uw' Rw2 Dw r' u D' x Uw2 Rw' /(22,17)
lucasparity Rw U2 Rw U2 r' U2 r U2 l' U2 l F2 r' F2 Rw' U2 Rw'/ (25,17)
Alg Rw U2 Rw U2 r' U2 Rw U2 l' U2 r U2 r' U2 (Rw' l) Rw' U2 Rw' /(27,18)
Holy_Grail z Dw' M D Lw' Uw' r' Uw Lw Uw' Lw2' Bw' r' Bw Rw' R' u y' M' Uw x2 z'/(19,18)
Alg Rw U L F' U l' Dw Uw Rw2 Dw' l' Dw Rw2 Dw' l Uw' U' F L' U' Rw' /(23,20)
Alg r U2 r' U2 r U2 r U r U r U2 r2 U2 r U2 r U r' U' r2 U2 /(31,22)
Alg r U r' U r' U' r2 U r2 U2 r' U2 r U2 r' U2 r' U r' U' r U r' U2 r U2 /(34,26) (SiGN)


PLL Parity (WCA Notation)

Alg Uw2 Rw2 U2 (Rw2 R2') U2 Rw2 Uw2
Alg Uw2 Rw2 U2 r2 U2 Rw2 Uw2
Alg r2 U2 r2 Uw2 r2 u2
Alg r2 U2 r2 Uw2 r2 Uw2
Alg (Rw2 R2') U2 (Rw2 R2') Uw2 (Rw2 R2') Uw2
Alg Rw2 B2 U2 r2 U2 B2 Rw2


Other ELL Cases

4-Cycles in Two Opposite Edges

Double parity

Alg r U2 r' E2 F2 l F2 l' F2 r F2 r' D2 l y2 /(21,14)
Alg r2 B2 r' U2 r' U2 B2 r' B2 r B2 r' B2 r2 B2/ (25,15)
Alg l2 F2 l' U2 l' U2 F2 l' F2 l F2 l' F2 l2 F2/ (25,15)


Checkerboard pattern

Alg (f2 u' r2 Uw2 S') r (S Uw2 r2 u f2) /(17,11)
Alg r' U2 r2 U2 r U2 r' U2 r U2 r2 U2 r' /(21,13)
Alg r U2 r2 U2 r' U2 r U2 r' U2 r2 U2 r /(21,13)
Alg l U2 l2 U2 l' U2 l U2 l' U2 l2 U2 l /(21,13)


Bowtie (adj. 2-swap + Pll Parity)

Alg F2 l2 F2 l F2 l' F2 r U2 l U2 r' U2 l U2 l' /(25,16)
Alg F2 r2 F2 r' F2 r F2 l' U2 r' U2 l U2 r' U2 r /(25,16)
Alg r U2 l' U2 r U2 r U2 r' U2 r U2 r2 U2 l r' U2 r' /(27,18)
Alg r U2 r l' U2 r2 U2 r' U2 r U2 r' U2 r' U2 l U2 r' /(27,18)


2-Cycles in Two Opposite Edges

Adjacent 2-swap

Alg r2 D2 r' D2 l D2 l' D2 B2 l' B2 r' /(19,12)
Alg r U2 r U2 x U2 r U2 l' x' U2 l U2 r2 /(19,12)
Alg l' U2 l' U2 x U2 l' U2 r x' U2 r' U2 l2 /(19,12)
Alg Rw2 U2 l U2 r' U2 r U2 (Rw l') U2 r U2 Rw /(20,13)
Alg Rw' U2 r' U2 (Rw' l) U2 r' U2 r U2 l' U2 Rw2 /(20,13)
Alg l' U2 l' U2 (l' r) U2 l' U2 l U2 r' U2 l2 /(21,14)
Alg r U2 r U2 (r l') U2 r U2 r' U2 l U2 r2 /(21,14)
Alg z' Lw U' r Uw Lw' Uw' r Fw r Fw' r2 Uw Lw u' Lw' z /(16,15)
Alg l2 D' f' D r D2 r' D' f D' l' F2 r' F2 l' /(19,15)


Opposite/diagonal 2-swap

Alg l' S2 U2 l U2 l' U2 r U2 r' F2 l B2 r z2 /(21,14)
Alg r S2 U2 r' U2 r U2 l' U2 l F2 r' B2 l' z2 /(21,14)
Alg l2 B2 U2 l U2 l2 B2 l U2 l2 U2 B2 l B2 /(25,14)
Alg r2 B2 U2 r' U2 r2 B2 r' U2 r2 U2 B2 r' B2 /(25,14)
Alg Uw Lw' Uw' l' Uw Lw2 Dw' Lw Uw' l' Uw L' Dw Lw' Uw'/ (16,15)
Alg Rw2 F2 U2 r U2 x U2 Rw2 U2 r' U2 l r U2 l' U2 x' /(25,15)
Alg l' U2 l U2 l U2 r' U2 l U2 l' U2 F2 l2 F2 r /(25,16)
Alg r U2 r' U2 r' U2 l U2 r' U2 r U2 F2 r2 F2 l' /(25,16)



Brief Algorithms which don't Preserve F2L

(All of the following algorithms are in WCA notation. Choose any of the moves from the brackets before and after the central portion of the algorithm.)

OLL Parity (Only)

  • { Uw, u, d } M R D R' Fw f E' l' E Fw b E F { Lw, l, r } (OLL parity) (15,15)

Double Parity

  • { Uw, u, d } R' b E' d' L' b L u' b2 Uw M' B' { Uw, u, d } (15,15)
  • { Uw, u, d } S L B' R u d f' u d L B' R S { Uw, u, d } (15,15)
  • { Uw, u, d } S L' F R' u d f' u d L' F R' S { Uw, u, d } (15,15)


  • The majority of the algorithms remaining to be displayed in this section have many variations, but yet all variations are the same as the few algorithms listed below.
  • The following "translations" of the algorithms work on all cube sizes.
  • For a list of more variations of these algorithms (but definitely not all possible variations), see

http://www.speedsolving.com/forum/showthread.php?26564-4x4x4-edge-parity-is-there-a-shorter-alg-that-doesn-t-preserve-corners&p=531938&viewfull=1#post531938

  • Note that all algorithms are in SiGN Notation unless mentioned otherwise.
  • OLL Parity (Only). You may perform the follow algorithms without wide turns, but they won't preserve as much.
Alg_1(WCA) Rw B U2 B' r B2 l B2 r B' D2 B Rw /(17,13)
Alg_2 r B' U2 B r B2 l B2 r B D2 B' r /(17,13)
Alg_2(v2) x' r' U F2 U' l' U2 r' U2 r' F' U2 F r' /(17,13)
Alg_2(v3) x' r' U F2 U' l' U2 r' U2 l' U' B2 U r' x' /(17,13)
Alg_2(v4) x' r' U F2 U' l' U2 r' 3d2 r' U' F2 U l' x /(17,13)
Alg_3 r U F2 U' l F2 2R U2 r U B2 U' r /(17,13)
Alg_4 r U' F2 U l F2 2R U2 r U' B2 U r /(17,13)
Alg r' U2 F U2 F' U2 r' U2 r' U2 r' F U2 F' r' /(21,15)(WCA)
Alg r' U2 F' U2 F U2 r' U2 r' U2 r' F' U2 F r' /(21,15)(WCA)


  • Double Parity
Alg_1 r F2 U2 l F U' R U' r2 B2 r' B2 r2 /(19,13)
Alg_1(v2) l' U2 F2 l' U' F R' F l2 U2 r U2 l2 U' x' /(20,14)
Alg_1(v3) l' U2 F2 l' U' F 3l' U l2 x' U2 r U2 l2 U' x' /(20,14)
Alg_2 r F2 U2 l F' U L' U r2 B2 r' B2 r2 /(19,13)
Alg_2(v2) r U2 F2 r U' F R' F r2 U2 l' U2 r2 U' x' /(20,14)
Alg_2(v3) r U2 F2 r U' F 3l' U r2 x' U2 l' U2 r2 U' x' /(20,14)
Alg_3 r F2 U2 l F U' (L' R) U' r2 B2 r' B2 r2 /(19,13)
Alg_4 r F2 U2 l F' U (L' R) U r2 B2 r' B2 r2 /(19,13)
Affects_M-Layer_Only r U2 r' U2 r' D2 r D2 r' B2 r B2 r' /(19,13)(WCA)


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