#### Kabuthunk

##### Member

Whup, for the title, I meant to put edge-pair locations, not corners... since the parity can be spotted before even starting corners (I'm still doing a beginner method that does corners last).

Ok, first up, I'm still fairly new to cubing, and albeit I wouldn't mind going faster, I'm not currently at the point of wanting to memorize a metric ton of algorithms. Or more specifically, that 15-move algorithm for fixing the parity on a 4x4x4 when one edge pair is flipped over. As of right now, I can solve all other situations (like two corners switched), but that double edge flip I just can't get down. And every single site I've seen only has the algorithm that just... solves the cube from there with the 15 moves. I need less moves, and then I can re-solve the edges and corners later.

Thus... is there a shorter algorithm that will flip that edge, not bothering to preserve corner placements or even edge placements (so long as it doesn't create another edge pair parity )? I've read here and there online that apparently the two-corner-switched algorithm (which was ridiculously easy to memorize thankfully) can be used to fixed the edge-pair-flip as well, but try it as I might, once I do the two-corner algorithm and re-place all the corners, that damn edge-pair parity just comes right back again.

Any help someone could toss me... or maybe if I'm just doing the two-corner algorithm wrong (I've been trying it with the two flipped corners facing me... it's the r2 U2 r2 U2 u2 r2 u2 algorithm I learned).

As well, I also bought a 5x5x5 on boxing week sale, so if there's a shorter non-corner-preserving, non-edge-triplet-location-preserving solution for that checkerboard pattern that can come up on one edge, that'd be awesome too.

Ok, first up, I'm still fairly new to cubing, and albeit I wouldn't mind going faster, I'm not currently at the point of wanting to memorize a metric ton of algorithms. Or more specifically, that 15-move algorithm for fixing the parity on a 4x4x4 when one edge pair is flipped over. As of right now, I can solve all other situations (like two corners switched), but that double edge flip I just can't get down. And every single site I've seen only has the algorithm that just... solves the cube from there with the 15 moves. I need less moves, and then I can re-solve the edges and corners later.

Thus... is there a shorter algorithm that will flip that edge, not bothering to preserve corner placements or even edge placements (so long as it doesn't create another edge pair parity )? I've read here and there online that apparently the two-corner-switched algorithm (which was ridiculously easy to memorize thankfully) can be used to fixed the edge-pair-flip as well, but try it as I might, once I do the two-corner algorithm and re-place all the corners, that damn edge-pair parity just comes right back again.

Any help someone could toss me... or maybe if I'm just doing the two-corner algorithm wrong (I've been trying it with the two flipped corners facing me... it's the r2 U2 r2 U2 u2 r2 u2 algorithm I learned).

As well, I also bought a 5x5x5 on boxing week sale, so if there's a shorter non-corner-preserving, non-edge-triplet-location-preserving solution for that checkerboard pattern that can come up on one edge, that'd be awesome too.

Last edited: Jan 5, 2011