The PLL parity algorithm does preserve all pieces but the switched edge pieces, and therefore can be used at the end of the solving (after solving all other last layer pieces). The probability to encounter a PLL parity during a 4x4 solve is 50% ...
If you have a pll parity in the third picture, move this andmake sure it's on the left side not the right. R, U, R', U', r2, U2, r2, Rw2, r2, u2, (Rw2, U', R, U', R') U, R, U', R' If you have a oll parity in the fourth picture, move this andmake sure y...
Parity– Parity is where the last algorithm we have learnt is used. If you come to the end of edge memorisation and notice you have an odd number of targets, you don’t need to count corners. Because of the way the cube works, an odd number of edge targets will always equal an odd...