The following algorithms are based upon the following state of the cube:
The front side looks like (where red is the front color, and yellow the bottom
color):
The back side looks like (where orange is the back color, and yellow the bottom
color):
So the bottom layer (yellow) is completed solved, and the top layer (white) is
solved except for one edge.
The not solved edge of the top layer is cubie D in the two images.
Next goal is to position the last top layer edge (D). After that only the middle
layer edges are not solved yet.
In this case you could position the last top layer edge with 6 moves
(EL'E'L2E'L').
But you could already make sure that the middle layer edges are oriented
correctly at the same time!
This will take 6 to 11 moves (average 8 moves). So in max. 5 moves extra
(average is 2 moves), you can make the last phase much easier. Because after this,
the middle layer edges only need to be positioned, to solve the cube.
The left face of the cube shows letters A, B and C.
Based upon the orientation of these edges, you can find out how to orient the middle layer edges.
There are 8 different situations, A, B and C can all be oriented correctly or
incorrectly.
A, B and C are oriented correctly:
- if the color is the same as the color of the center between A and C
or
- if the color is the same as the center at the opposite side.
Edge A | Edge B | Edge C | Algorithm |
C | C | C | E'L'E'LELE'L' (8,8) |
C | C | I | L2E'L'EL'E'L'EL (9,10) |
C | I | C | EL'E'L2E'L' (6,7) |
C | I | I | LELE'L'E'L' (7,7) |
I | C | C | E'LELE'LEL (8,8) |
I | C | I | LE'LELEL'E'L'EL' (11,11) |
I | I | C | LEL'E'LE'L' (7,7) |
I | I | I | LE'LE'LEL2EL' (9,10) |
The above images can also be mirrored vertically. In that case the edge at
position D has the same position, but the edge needs to be positioned in the
bottom layer instead of the top layer.
The algorithms you can use, are still the same, with one exception: L becomes
L', and L' becomes L.
Number of twisted edges | Action |
1 | Move the middle layer, so that the FL edge is not twisted, and the FR edge is twisted. Then do the following algorithm: RU2R'E2R2E'R'U2R' (9,13,16) |
3 | Move the middle layer, so that the FL edge is not twisted, and the FR edge is twisted. Then do the following algorithm: LELELEL (7,7,10) |
Number of twisted edges | Position of twisted edges | Action |
0 | - | No action. Move on to positioning the edges. |
2 | Next to each other | Move the middle layer, so that the two twisted edges are at FL and FR. Then do the following algorithm: R2FMF'R2FM'F' (8, 10, 12) or L'EL'EL2E'L'E'L (9,10,14) |
2 | Opposite each other | Move the middle layer, so that the two twisted edges are at FL and BR. Then do the following algorithm: FMF'R2FM'F'R2 (8,10,12) or LEL'EL2E'L'E'L' (9,10,14) |
4 | - | Do the following algorithm: LEL2F2L'E2LF2L2E'L' (11,16,20) or RF2R2ERE2RF2R2ER (11,16,20) or F'U'FERERERERF'UF (14,14,18) |
Good luck!