Random Cubing Discussion

[ariasamie]

qqTimer can be more accurate than a stackmat.
because you can't get a 0.00 with a stackmat!

this photo is not made by photoshop or paint.
sometimes I just keep hitting the space button so fast that the timer doesn't even stop.

 

[Kirjava]

You can get 0.00 on a QJ timer.

Athefre/Cride - I still think your 2x2x2 methods are too complicated - too much to remember!

However,

I think what sets apart an intuitive method from an algorithmic method is that the details don't really matter ... as long as the solver is aware of the sub-goals to be reached, they should be able to kludge together the bits in between, even if the exact moves have been forgotten.

I've actually seen this happen at the "solve all edges" point in 8355. The guy I taught made up his own system for doing it.

 

[Cride5]

Athefre/Cride - I still think your 2x2x2 methods are too complicated - too much to remember!

How about the '35' method


@ariasamie, just because a timer can register better time resolution doesn't mean it's more accurate. A general problem with PC based timers (and this includes CCT) is that they share processing with other tasks. If your computer decides that some task is more important than 'stop timer' then your times are going to be wrong. Personally, I would trust a Stackmat/QJ timer more than anything on a PC.

 

[Kirjava]

Athefre/Cride - I still think your 2x2x2 methods are too complicated - too much to remember!

How about the '35' method

idk man, it's better - but it's still confusing. I was hoping for something really intuitive - something I can teach someone in 30 seconds.

The biggest problem is solving the adj swap intuitively. Doing one move and solving the corners again gets confusing because people forget where the corners are supposed to be.

 

[Cride5]

The problem with adj swap is that any alg for it is going to be at least 9 moves. It's very difficult to break that down into intuitive sub-steps.

The method I suggested makes half of the moves (the final 5) completely intuitive and difficult to mess up, because the cube is reduced to the R2, U group. As long as they don't let go of bottom-left two cubies, it should be a doddle.

The hardest part is the first 5 moves, setting up for the re-grip. It requires the solver to remember:
* Bring DR pair up to UB
* Break it up
* Do the R2 swap
* Regrip

... I can't really think of a nicer way to do it. Perhaps some kind memory trick would help. ... like an acronym for the steps. All I could think of is: BASS (Back, And Split then Swap).

 

[ben1996123]

You can get 0.00 on a QJ timer.

You can also get 0.00 on this.

 

[qqwref]

Easy to remember two-swap on back (for 2x2x2):
R2 D2 (R'F')*7.5 D2 F2

I had the idea of making a StackMat-like timer that runs on 1000 Hz (yes, three decimal places) instead of 60 Hz. I don't know if this is a reasonable modification but I'm going to give it a shot.

 

[jms_gears1]

kirjavaparity.

 

[shelley]

This makes me want to make a magic with Look of Disapproval on the solved side. I would not compete with it, but I would lend it out to anyone who asks at competitions.

Unfortunately, this would involve me owning a magic.

 

[qqwref]

Unfortunately, this would involve me owning a magic.

If you're worried about that, I could do the owning for you. It would just be on an indefinite, free lease.

 

[shelley]

I... suppose that could work? It would also make things easier if you happen to already have an extra magic lying around, because I certainly don't.

 

[ben1996123]

lolkirparity

3R' U' (2F' F) U2 (2F F') U 2M' U2 R

 

[Kirjava]

Easy to remember two-swap on back (for 2x2x2):
R2 D2 (R'F')*7.5 D2 F2

That is sexy. I lol'd at *7.5.

 

[qqwref]

I... suppose that could work? It would also make things easier if you happen to already have an extra magic lying around, because I certainly don't.

I do actually. It's kinda tight and has my own custom inserts in it, but your idea is way better than mine was.

 

[ariasamie]

@ariasamie, just because a timer can register better time resolution doesn't mean it's more accurate. A general problem with PC based timers (and this includes CCT) is that they share processing with other tasks. If your computer decides that some task is more important than 'stop timer' then your times are going to be wrong. Personally, I would trust a Stackmat/QJ timer more than anything on a PC.

I know. I was just joking

 

[irontwig]

5 corner cycle: [MU2M',F]

 

[qqwref]

5 corner cycle: [MU2M',F]

Hm, interesting. And [M'U2M,F] does the same plus an H perm on F. Also, (M'U2MF)2 does two corner 3-cycles with no edges changed.


EDIT: Oh yeah, and that U perm I was showing people at Nats:
(M'U2M) U (M'U2M) U (M'U2M)

 

[Kirjava]

Another LL method me and Rob played with; FreePLL/PureOLL

FreePLL;

Y- F R U R' U' F'
V- R U' R' F R F' U R
R- R U R' U' R' F R F'
A- Niklas
U- Sune
N- R U R' F' L' U' L F
J- R' F R U R' U' F U R
G- R U2' R' U2 R' F R F'
T- R U R' U R U' R' U' R' F R F' / F R U R' U' R U' R' U' R U R' F'
E- R' U' R U' R' U y' R' U R B / R U R' U R' F R F' R U2 R'
F- F R U' R' U R B U B' R' F'
Z- F R U R' U' F' f R U R' U' f' / R' F' U' F U R2 B U B' U' R'

We never generated all the PureOLL algs, because they suck. So here's 2look; (The EO algs affect some corners, too. The adj alg might actually be useful for other things)

EO;

Adj- R' U' R2 B' R' B2 U' B'
Opp- B' R' U2 B U B2 R B R2 U R2 B
All- R' U' F' U F R F R U R' U' F'

CO;

L- [r' u R2 u' r, U2]
U- (RBS) (RFS)
T- (RFS) (LFS)
Pi- R U2 F2 R' U' F R' U2 F' U2 R2 F U R' F U2
Sune- U' B U' F U2 B2 D' R2 U D F' U' B
H- U R L' D' R2 U2 R' D R2 U2 L U' L2 B2 L2

 

[Gavin]

Oh yeah, and that U perm I was showing people at Nats:
(M'U2M) U (M'U2M) U (M'U2M)

Thats pretty neat. And there is also the R U R' U' L' U' L U2 R U' R' U' L' U L. Lots of strange U perms...

 

[qqwref]

Another LL method me and Rob played with; FreePLL/PureOLL

FreePLL;

Y- F R U R' U' F'
V- R U' R' F R F' U R
R- R U R' U' R' F R F'
A- Niklas
U- Sune
N- R U R' F' L' U' L F
J- R' F R U R' U' F U R
G- R U2' R' U2 R' F R F'
T- R U R' U R U' R' U' R' F R F' / F R U R' U' R U' R' U' R U R' F'
E- R' U' R U' R' U y' R' U R B / R U R' U R' F R F' R U2 R'
F- F R U' R' U R B U B' R' F'
Z- F R U R' U' F' f R U R' U' f' / R' F' U' F U R2 B U B' U' R'

I didn't call it this but I've had this idea too (a long time ago). Unfortunately flipping stuff is so move-intensive that this idea is essentially useless for speed, OH, and FM.

As for "pure OLL" though, if you're going to go 2-look, I really recommend doing corners first. Edges are easy to do with MU algs, but the more complex corner flips are pretty ugly, and I imagine there are much nicer ones out there if you allow some edges to be flipped too.

EDIT: Oh, check this out.
(U2) R U2 l' U2 L U' r' U2 L' U2 r U'