Random Cubing Discussion

[TheOneOnTheLeft]

Why do preassembled cubes come with crappy lube on the pieces, slowing down breaking in, yet no lube in the core meaning awful spring noise? Cube manufacturers: please lube the core but leave the pieces dry!

Presumably it's because it makes the cube seem better for out of the box performance, and it's far easier to squirt some lube on the pieces, taking less than a minute to spread it around, compared to the more precise and time consuming task of lubing the core.

 

[mark49152]

Presumably it's because it makes the cube seem better for out of the box performance, and it's far easier to squirt some lube on the pieces, taking less than a minute to spread it around, compared to the more precise and time consuming task of lubing the core.

Indeed. Actually mine was a rhetorical question as an expression of irritation. I don't know what the emoticon is for that.

 

[RCTACameron]

While playing around with a 3x3, I found that these were interesting to repeat doing until the cube was solved again:
R U R' F' y
R' F R F' R y

The first takes 120 repetitions to get back to solved. I was doing the second one, but gave up when this told me that it took 1260 repetitions to solve. :O

 

[MadeToReply]

Doing R+ D- R- D+ a lot on a megaminx eventually will cycle 10 centres. Like a lot a lot a lot too many times to count

 

[RCTACameron]

Doing R+ D- R- D+ a lot on a megaminx eventually will cycle 10 centres. Like a lot a lot a lot too many times to count

Wow :O That would look cool. I wouldn't want to try though.

 

[TDM]

Doing R+ D- R- D+ a lot on a megaminx eventually will cycle 10 centres. Like a lot a lot a lot too many times to count

After doing it for a while, all the corners and about half the edges are solved again I think the edges are an 18-cycle... if that means I have to do this 17 more times, then I think this is going to take a while.
Did something wrong

 

[Stefan]

Just a probably known F2L alg I just made up (maybe useful for edge control), plus variations:
f U R U' R2' f'
R' F' U' F U2 R
F R U R' U2 F'

 

[TDM]

I timed my F2L cases, and got a graph that looks kind of random:

Spoiler

Now look what happens when you order it by time:

Spoiler

Didn't expect to see that much of a pattern. Has anyone else tried this?

 

[applemobile]

I don't believe it

 

[KongShou]

That's amazing

 

[uberCuber]

That's pretty cool, when you order your cases from fastest to slowest, you get a graph that goes from fastest to slowest! What an exciting and surprising pattern!

srsly though, I have no idea what kind of point you were trying to make

 

[TDM]

srsly though, I have no idea what kind of point you were trying to make

I expected it to be more like what is is now, and not to produce a symmetrical pattern.

 

[Tim Major]

Just got a Galaxy S4 and filmed a slowmo Z-perm: http://www.youtube.com/watch?v=mcByA1darHI&feature=youtu.be

I can do it sub 1 with this fingertrick very frequently. M'2 U' etc.

Not sure where to post this, but this should be ok

 

[Stefan]

Just came across this funny-looking "bead-surface" 4x4:
http://zcube.cn/Standard/4x4x4/DianSheng-4x4x4-Bead-surface.html

 

[Robert-Y]

That is how I used to imagine the perfect cube would be, with ultimate corner cutting.

 

[TheNextFeliks]

For my engineering design class, I need to bring in something to reverse engineer, something I can take apart and cad the pieces. I think I might do my square-1. Pretty straight forward. No real weird shapes or features

 

[qqwref]

Weird idea: inverse PLL attack. Instead of executing all 21 PLLs, you must start from a solved state and bring the cube to each PLL at some point during the move sequence. The 21 PLLs do not all have to appear on the same side.

How fast can this be done? I imagine the optimal solution would involve spamming easy perms, but other than that, I dunno.

 

[kcl]

Weird idea: inverse PLL attack. Instead of executing all 21 PLLs, you must start from a solved state and bring the cube to each PLL at some point during the move sequence. The 21 PLLs do not all have to appear on the same side.

How fast can this be done? I imagine the optimal solution would involve spamming easy perms, but other than that, I dunno.

Wait so as in like you could do the same A perm twice and knock off two birds with one stone?

 

[Tim Major]

Yes, also follow the two aperms with uperms to cover the gperms and other 3 edge, 3 corner PLLs

 

[qqwref]

Wait so as in like you could do the same A perm twice and knock off two birds with one stone?

Yeah, those two A perms would bring it into both A perm positions.