Normal swap to bring top LR to bottom
For swapping the upper layer LR edge with the edge below it (to get both LR edges on the bottom), do an
M/M' move to keep that LR edge on top, then a
U2, then the opposite of the first
Top LR with matching corners
M/M' move to keep the top LR edge on top, do a
U2 then repeat the first
Top LR with opposite corners
M/M' move to move the top LR edge to the bottom, do a
U2 then do the opposite of the first
The following solutions are for specific cases where 4C will be a non-cycle case. Influencing begins when EO is solved, and involves inserting LR edges in a non-typical fashion.
For cases not shown, one should insert LR edges normally as shown above. The solutions below typically insert them the opposite way.
The solutions either:
- skip the dots case, resulting in a 4C skip,
- or end up with a 2 or 3 mover 4C (
M2 U2 M2) instead of some 5 mover (e.g.
M' U2 M2 U2 M), after AUF'ing when EOLRb is solved.
Either way, they're more efficient.
The cases are quite easy to recognise by only looking at the U-face colors and pattern; form your own recognition methods.
DFDB in ULUR:
2 D-stickers on M slice and U layer
Dots Skip 1
Dots Skip 2
Note: Less efficient than inserting normally and solving dots with
E2, but you may prefer this.
Dots Skip 3
The DFDB edge on top (blue white edge in this case) is adjacent to the center of the opposite color (green).
Dots Skip 4
The DFDB edge on top (green white edge in this case) is adjacent to the center of the opposite color (blue).
Dots Skip 5
Dots Skip 6
It is not recommended to memorize algsheets for EOLR. Learn from text descriptions below: