Re: Solving the last layer: speed cubing

Expand Messages
• ... the ... it ... flips ... #3 ... which to ... all edges ... pair ... each ... opposite) ... other ... backwards (R ... level of ... I t does. Thanks.
Message 1 of 16 , Dec 3, 2003
--- In speedsolvingrubikscube@yahoogroups.com, "Grant
Tregay" <Grant@T...> wrote:
> --- d_j_salvia wrote:
> > The four basic sequences are:
> > 1. Move corners around: R U' L' U R' U' L
> > 2. Rotate corners: R U R' U R U2 R
> > 3. Move edges around: F2 U r U2 r' U F2
> > 4. Flip over two edges: r U r' U2 r U r'
>
> > I assume that the orientation for those four moves is so that
the
> > last layer is face up?
>
> Yes, with a minor correction on #2 - the last R should be R', so
it
> 2. Rotate corners: R U R' U R U2 R'
>
> Also, #3 and #4 will probably have to be intermixed a bit. #4
flips
> two adjacent edges - if none are adjacent, you will need to use
#3
> first to put them next to each other. Also, once all edges are
> flipped, you still need to move them around. The order in
which to
> use these algs would be as follows (assuming no luck - e.g.
all edges
> A) Apply #1 once (adjacent pair swap) or twice (diagonal/two
pair
> swap)
> B) Apply #2 once (rotate 3 clockwise), twice (rotate 3 cc or 2
each
> way) or 3 times (rotate 1 each way)
> C) Apply #3 if necessary (Only 2 edges need to flip and are
opposite)
> D) Apply #4 once (to flip 2 edges) or twice (to flip 4 edges)
> E) Apply #3 once (to permute 3 edges clockwise) or twice (all
other
> cases)
>
> Also, if you learn to do #2 both forward (as stated) and
backwards (R
> U2 R' U' R U' R'), you can always orient corners with 1 or 2 algs
> (instead of sometimes 3). Perhaps you didn't need/want this
level of
> detail, but here it is anyways :-P Hope it helps!
>
> - Grant

I t does. Thanks. However, if you want to rotate two opposite
corners, then you can use the "rube move" instead of 3,4,3. The
rube move was (partially?) developed by Rubik himself and is
thus:

r U r U r U2 r' U r' U r' U2

Hold the cube so that both are on top, one in the front, and one in
the back. r is also interchangeable with r', as long as each
instance is switched, of course. I like this move a lot. It was pretty
easy to learn, so therefore was the first I remember memorizing
from an outside source.

Oh, by the way, in #1- 4, which are the cubes that are
permutated/ orientated in relation to how one holds it?
• Hi Grant, Thanks for catching my goofs. :) Concerning the two piece flip over. I thought I d give a simple sequence that he d have to think about a little,
Message 2 of 16 , Dec 3, 2003
Hi Grant,

Thanks for catching my goofs. :)

Concerning the two piece flip over. I thought I'd give a simple
sequence that he'd have to think about a little, rather than a more
complex all-purpose one like:
Do R' u R2 u2 R' Which flips over the UR edge piece first, and also
messes up the F2L a little, then turn U to any of the other edge
pieces on the LL, then undo the messing up by doing the sequence
backwards: R u2 R2 u R, then what ever U needed to realign the LL.

I'm not at all sure why I switched #s 3 and 4 because I do the edge
flipping before the placing

Regards,

David J

--- In speedsolvingrubikscube@yahoogroups.com, "Grant Tregay"
<Grant@T...> wrote:
> --- d_j_salvia wrote:
> > The four basic sequences are:
> > 1. Move corners around: R U' L' U R' U' L
> > 2. Rotate corners: R U R' U R U2 R
> > 3. Move edges around: F2 U r U2 r' U F2
> > 4. Flip over two edges: r U r' U2 r U r'
>
> > I assume that the orientation for those four moves is so that the
> > last layer is face up?
>
> Yes, with a minor correction on #2 - the last R should be R', so it
> 2. Rotate corners: R U R' U R U2 R'
>
> Also, #3 and #4 will probably have to be intermixed a bit. #4 flips
> two adjacent edges - if none are adjacent, you will need to use #3
> first to put them next to each other. Also, once all edges are
> flipped, you still need to move them around. The order in which to
> use these algs would be as follows (assuming no luck - e.g. all edges
> A) Apply #1 once (adjacent pair swap) or twice (diagonal/two pair
> swap)
> B) Apply #2 once (rotate 3 clockwise), twice (rotate 3 cc or 2 each
> way) or 3 times (rotate 1 each way)
> C) Apply #3 if necessary (Only 2 edges need to flip and are opposite)
> D) Apply #4 once (to flip 2 edges) or twice (to flip 4 edges)
> E) Apply #3 once (to permute 3 edges clockwise) or twice (all other
> cases)
>
> Also, if you learn to do #2 both forward (as stated) and backwards (R
> U2 R' U' R U' R'), you can always orient corners with 1 or 2 algs
> (instead of sometimes 3). Perhaps you didn't need/want this level of
> detail, but here it is anyways :-P Hope it helps!
>
> - Grant
• ... The sequences: 1. Move corners around: R U L U R U L 2. Rotate corners: R U R U R U2 R 3. Move edges around: F2 U r U2 r U F2 4. Flip over two
Message 3 of 16 , Dec 4, 2003
> Oh, by the way, in #1- 4, which are the cubes that are
> permutated/ orientated in relation to how one holds it?

The sequences:
1. Move corners around: R U' L' U R' U' L
2. Rotate corners: R U R' U R U2 R'
3. Move edges around: F2 U r U2 r' U F2
4. Flip over two edges: r U r' U2 r U r'

Assuming we don't care about what happens to the other pieces, which
are affected by later steps...

#1 Swaps UFL and UBL
#2 Rotates UFR, UBR, and UBL clockwise
#3 Permutes UF -> UL -> UR -> UF
#4 Flips UB and UL and permutes UB -> UR -> UL -> UB

- Grant
• Hey, thanks again, I ll be working on this for a while. I m still experimenting with what I want to use for now but in the meantime, my sights on Fridrich.
Message 4 of 16 , Dec 4, 2003
Hey, thanks again, I'll be working on this for a while. I'm still
experimenting with what I want to use for now but in the
meantime, my sights on Fridrich. (I'll get there some day....)

--- In speedsolvingrubikscube@yahoogroups.com, "Grant
Tregay" <Grant@T...> wrote:
> > Oh, by the way, in #1- 4, which are the cubes that are
> > permutated/ orientated in relation to how one holds it?
>
> The sequences:
> 1. Move corners around: R U' L' U R' U' L
> 2. Rotate corners: R U R' U R U2 R'
> 3. Move edges around: F2 U r U2 r' U F2
> 4. Flip over two edges: r U r' U2 r U r'
>
> Assuming we don't care about what happens to the other
pieces, which
> are affected by later steps...
>
> #1 Swaps UFL and UBL
> #2 Rotates UFR, UBR, and UBL clockwise
> #3 Permutes UF -> UL -> UR -> UF
> #4 Flips UB and UL and permutes UB -> UR -> UL -> UB
>
> - Grant
Your message has been successfully submitted and would be delivered to recipients shortly.