|1. Do the Up (white) Corners intuitively, properly aligned.|
2. Place the Down (yellow) Corners:
Turn the yellow face so that at most 2 corners are
displaced. Hold them between the left thumb and index finger, and swap them:
RBRB RBRB RBRB RBR. (If they are diagonal, make them adjacent for the swap.)
3. Orient the Down (yellow) Corners: If 1 yellow corner cubie is properly aligned,
turn the cube so that it is Down Right Front. Otherwise turn the cube to place a cubie there,
with its yellow facelet on the Right. (The White corners are always Up.)
Do: RBLF RBLF RBLF. (Repeat all of step 3 until the corners are done.)
4. Do the Edges:
To move an edge cubie, align it opposite its home cubicle,
properly oriented (down the Back); line up a helper edge-pair (already matched, or both still
random) alongside (down the Right); Do: RRBB RRBB RRBB; invert the line-up turns
(having noted their face-colours).
To move a White corner cubie from the Down face into its own cubicle:
Hold the cube so that the target cubicle is at Up-Right-Front.
Turn the Down face to move the cubie to Down-Right-Front.
If the cubie's White facelet is Down, do DDD RRR DD R B R BBB.
If the cubie's White facelet is Right, do LLL FFF L.
If the cubie's White facelet is Front, do B R BBB.
If the cubie is on the UP face, move it to the Down face first.
Q: What if 2 edges are flipped in place?
A: Swap them; then send them home properly oriented.
In general, to move a Cubie into a Cubicle, we need to realize that an Edge-Cubicle lies on
2 Faces, and therefore has 2 opposite Cubicles. We need to move the Cubie into one of the
2 opposite Cubicles, properly oriented, or else it will be flipped when we send it into its
target Cubicle. To move a Cubie into a specific Cubicle takes at most 2 turns. But to
move it there properly oriented may take 3 turns. To align a helper edge-pair may take
another turn. Then, holding the cube correctly, we apply the edge-pair swapping Transform
(RRBBRRBBRRBB), and then we undo the line-up turns, in reverse. When remembering the
line-up turns, it helps to refer to them by Colour, not by position.
[ peter [at] dancing [dot] org ]