Random Cubing Discussion

[cmhardw]

I guess this is the best place to post this - I just got a LL skip! I wasn't timing the solve, just doing some slow solves for practice. It took me a while to realize that it was a LL skip. I scrambled, and on the last F2L pair I got a pair that I've recently been practicing being able to do on the back of the cube. After doing the pair a U2 AUF solved the cube. I didn't realize and just scrambled the cube again. About 10 turns in I realized... wait.... O_O

 

[ariasamie]

I guess this is the best place to post this - I just got a LL skip! I wasn't timing the solve, just doing some slow solves for practice. It took me a while to realize that it was a LL skip. I scrambled, and on the last F2L pair I got a pair that I've recently been practicing being able to do on the back of the cube. After doing the pair a U2 AUF solved the cube. I didn't realize and just scrambled the cube again. About 10 turns in I realized... wait.... O_O

lol ! when my only LL skip happened, I was thinking if it was an OLL or a PLL skip!! after about 5 seconds... woah!!! I got a LL skip!

 

[Xishem]

lol ! when my only LL skip happened, I was thinking if it was an OLL or a PLL skip!! after about 5 seconds... woah!!! I got a LL skip!

I got a LL skip yesterday, along with 7 PLL skips and 2 OLL skips :O yesterday was just my lucky day, I guess.

 

[Tyjet66]

So, today at school, I was practicing my edges for Old Pochmann, I gave 4 full attempts (edges only) and succeeded 3 times. But I'm curious, for people who do full BLD solves, what is your success rate?

 

[Rpotts]

uhhhhhh, you're going to get a lot of very different answers. A beginner BLD cuber may reply very low, 10% or so, and an expert may claim over 90% or something. Why does it matter? Getting 3/4 attempts (even for only edges) is good for a beginner.

 

[Tyjet66]

I was merely curious. Although, I have found out that I have yet to fail any memorization, my only failures are due to set-up moves or somehow messing up T-perms or Y-perms (rare but it happens.)

 

[qqwref]

Another (obvious?) F2L trick, this one is kinda a multislotting one:

R' F R U2 F'

 

[ariasamie]

wow!

Spoiler

chuck!!

 

[Cubenovice]

also while I'm at it does anyone have algs for the "Advanced Human Thistlethwaite" method by pseudoprogrammer/grant slatton? I have been trying to get in contact with him but he doesn't seem to go online very often...

I asked the same question abut a week ago but so far no reply...
Currently generating some extra algs to orient multiple corners at once without messing up EO and keeping equator edges in the E slice. (They may permute within the layer though)
Unfortunately cube explorer does not seem to facilitate this specific restriction.

Some algs for U face corner orientation (with "fixed" E slice) for the 6 "non-Sune" cases with one corner already oriented.
Note: these may affect corners on the D face but that is still to be solved anyway...
I still have to check for versions that may permute E slice edges.
F U R2 U' R2 F'
F' U2 R2 U2 R2 F
R' U R U2 R' U R
R U' R' U2 R U' R'
F R2 U2 R2 U2 F'
F R2 U R2 U' F'

As I see it there are max 13 additional algs to learn for orienting all corners in two steps:
U face: 81-1= 80 80/AUF= 20 distinct cases (of which 7 are standard OLL)
After solving these you can only have a std OLL left on the D face.

Whan I have some more info I would like to move this discussion to one of the existing HTA threads.

 

[Tyjet66]

When doing BLD solves (or, attempts) does anyone else have their heart pumping really fast towards the end? It's weird but it keeps happening to me.

 

[Zane_C]

When doing BLD solves (or, attempts) does anyone else have their heart pumping really fast towards the end? It's weird but it keeps happening to me.

I love that feeling of adrenaline pumping into you.
It doesn't happen as much as it used to, but it still happens on multi attempts where I think I haven't already failed. Same goes for 5bld. My heart was going crazy on my first 7BLD attempt, I literally had to stop and breath because I was shaking too much with the last few pieces.

 

[HelpCube]

I love that feeling of adrenaline pumping into you.
It doesn't happen as much as it used to, but it still happens on multi attempts where I think I haven't already failed. Same goes for 5bld. My heart was going crazy on my first 7BLD attempt, I literally had to stop and breath because I was shaking too much with the last few pieces.

yea, especially when you know it was a tricky BLD solve but you figured it all out, gives you alot of satisfaction

 

[JackJ]

B' F' R B' L' D F U' B2 D2 R2 F' B R2 U' R' U2 D' L R B D U' B2 R

x' U L R' B2 U2 F2 x'
R U' R' U y' R' U R
y2 R' U R U' R' U' R
U R U' R'
y2 R U R' U' F R' F' R
U f R U R' U' f'
U' R' U L' U2 R U' R' U2 L R

54 moves 11.11 seconds 4.86 tps

I thought it was a pretty smooth solution.

 

[ben1996123]

Kinda off topicish, but still relevant to the forum, 1/2 million total posts.

Also I was so shocked at school today when someone said "Rubik cube", and not something like ananeroobicks croob.

 

[qqwref]

Here's a tricky subset to try:
<x, y, z, U M2 U', U' M2 U>

I got down to 2 flipped edges and couldn't figure out how to solve that. The solution method is interesting and actually somewhat reminiscent of the more complicated edge-turning cubes.

 

[mr. giggums]

just messing around with <x, y, z, U M2 U', U' M2 U> and here's a couple of algs (most are obvious).

UL-UR DF-DB - U M2 U' U' M2 U or
UL-UR DF-DB - U' M2 U U M2 U'

UL-BR-DF - [U M2 U' , z]*2
UL-DF-BR - [U' M2 U , z]*2

UL-FR-DF - (U' M2 U z U M2 U' z')*2
UL-DF-FR - (U M2 U' z U' M2 U z')*2

UR-DL-UL - [U M2 U' U' M2 U , z]*2
UR-UL-DL - [z , U M2 U' U' M2 U]*2

 

[qqwref]

Nice finds (but your commutator notation on UL-BR-DF is wrong, it is just (U M2 U' z U M2 U' z')2). Took me a while to see why the last one works.

 

[mr. giggums]

Nice finds (but your commutator notation on UL-BR-DF is wrong, it is just (U M2 U' z U M2 U' z')2). Took me a while to see why the last one works.

Actually the inverse of U M2 U' is U M2 U'.

Also how they work is you but a piece (UR, DF, or DB) in the UL slot. Then you put another piece in that slot (DL, FR, BR) in the UL slot and then undo every thing. Of course the centers would be effected too but something like M2 E2 M2 E2 would effect them. So there are a lot more algs to be formed using this method.

EDIT: found two flip
[U M2 U' , z]*2 x y [U M2 U' , z]*2 x' y' [U M2 U' , z]*2

EDIT2: formed into an adjacent two flip
x y U M2 U' U' M2 U x' y' (above two flip) x y U M2 U' U' M2 U x' y'

After typing xy and x'y' I think that there should be notation for a rotation around a corner. (Could be the same as a skewb notation.)

 

[qqwref]

Actually the inverse of U M2 U' is U M2 U'.

Oh, you're right, my bad.

After typing xy and x'y' I think that there should be notation for a rotation around a corner. (Could be the same as a skewb notation.)

I've seen "w" used for a rotation around the UFR corner. I don't think it would be practical to have a symbol for every possible corner rotation though.

EDIT: found two flip
[U M2 U', z]*2 x y [U M2 U' , z]*2 x' y' [U M2 U' , z]*2

How about this:
[z, U M2 U']*2 x y [U M2 U', z]*2 y' x'

 

[mr. giggums]

I've seen "w" used for a rotation around the UFR corner. I don't think it would be practical to have a symbol for every possible corner rotation though.

Yeah, I figured that it wouldn't be that practical.

How about this:
[z, U M2 U']*2 x y [U M2 U', z]*2 y' x'

I thought that there would be a solution like that but mine is the first one I came up with.

Also does this generate the full edge group + opposite centers.