[Help Thread] 4x4 Discussion and Help

[andew0]

I dont know how you avoid parity on 4x4 because sometimes I get cases where there is a 2 wing swap (opposite or knight shape) and I don't know how to avoid or solve that. if you can please tell me how it makes my times like 2 minutes

 

[LBr]

Anyone know a good alg for these?
And mirror as well if possible

 

[xyzzy]

I dont know how you avoid parity on 4x4 because sometimes I get cases where there is a 2 wing swap (opposite or knight shape) and I don't know how to avoid or solve that. if you can please tell me how it makes my times like 2 minutes

Like LBr's pictures above?

You shouldn't be getting those cases if you're using reduction; pair all of the edges, then deal with OLL parity when you get it. "Avoiding" OLL parity is usually done by solving edge parity together with the centres, but to do that you need to know how to count the edge parity from a fully scrambled cube.

Anyone know a good alg for these?
And mirror as well if possible

Check 4BLD alg sheets.

The way I'd solve these are:
r2 F2 U2 2R U2 2R2 F2 r R U2 2R2 U2 F2 2R F2
(y') [R' F' : 2R U2 2R U2 F2 2R F2 2L' U2 2L U2 2R2]
which are almost certainly not the fastest.

 

[UncleFrank]

What should splits %'s be for 4x4?

 

[Timona]

What should splits %'s be for 4x4?

I average around 42-44 for context.

Cross edges and centres: 21 secs.
Edge pairing: 10 secs
3x3 stage: 14 secs, more or less.

Splits should be 47%/22%/31%. Parity is not included

So it should be like a 50/20/30 split, it may also vary from person to person

 

[LBr]

Interesting. Your first split is about the same as mine but I average high 40s

 

[xyzzy]

From a 46-second mean of 12, frame-counted:

F2C: 4.3 s (9%)
3cross + L4C: 13.4 s (29%)
Edge pairing: 12.8 s (28%) (includes last cross edge)
F2L + LL: 15.7 s (34%)

Probably doesn't make too sense to compare my splits to others' because I usually also solve one F2L pair between finishing the cross and doing the rest of edge pairing.

also I got on-cam-PB single while measuring this but the camera angle is horrendous and you can barely see anything anyway

 

[andew0]

ya thanks man

Like LBr's pictures above?

You shouldn't be getting those cases if you're using reduction; pair all of the edges, then deal with OLL parity when you get it. "Avoiding" OLL parity is usually done by solving edge parity together with the centres, but to do that you need to know how to count the edge parity from a fully scrambled cube.


Check 4BLD alg sheets.

The way I'd solve these are:
r2 F2 U2 2R U2 2R2 F2 r R U2 2R2 U2 F2 2R F2
(y') [R' F' : 2R U2 2R U2 F2 2R F2 2L' U2 2L U2 2R2]
which are almost certainly not the fastes

 

[Caden Fisher]

Should I pair cross edges on the E layer or M layer? I usually use the E layer. Average about 1:20

 

[One Wheel]

Should I pair cross edges on the E layer or M layer? I usually use the E layer. Average about 1:20

I use Yau, and pair 3 cross edges in the M layer, then solve last 4 centers, then usually rotate to solve the last cross edge in E. Also average about 1:20.

 

[NigelTheCuber]

I use Yau, and pair 3 cross edges in the M layer, then solve last 4 centers, then usually rotate to solve the last cross edge in E. Also average about 1:20.

Same here, I think world class people also do that. (I have a 59.86 ao100)

 

[LBr]

Should I pair cross edges on the E layer or M layer? I usually use the E layer. Average about 1:20

Doesn’t matter too much. I switched to M but most people don’t do that. Just depends on whether you want nicer centres or nicer F3E

 

[OldSwiss]

I use Yau, and pair 3 cross edges in the M layer, then solve last 4 centers, then usually rotate to solve the last cross edge in E. Also average about 1:20.

Same for me but with 2 Minute average.

For 5x5 I and larger used to do it on th E Layer but at least for 5x5 I'm also switching to M

 

[sp33dqbr123]

quick question: is doing the first three edges into half-centres, or each centre one by one (depending on availability of bars, etc), and then finishing the last edge, more optimal than doing all four white edges followed by completing the centres? I've always done the latter of these, and recently learnt half centres, so im wondering which is generally more optimal and widely used by top solvers. thanks

 

[Jorian Meeuse]

quick question: is doing the first three edges into half-centres, or each centre one by one (depending on availability of bars, etc), and then finishing the last edge, more optimal than doing all four white edges followed by completing the centres? I've always done the latter of these, and recently learnt half centres, so im wondering which is generally more optimal and widely used by top solvers. thanks

3 edges, then centers, then last cross edge. There isnt really an efficient way to solve the centers if all cross edges are already solved. I just tried it and it is possible but not fast by any means.

 

[sp33dqbr123]

3 edges, then centers, then last cross edge. There isnt really an efficient way to solve the centers if all cross edges are already solved. I just tried it and it is possible but not fast by any means.

ok thanks, and is it more optimal to the last cross edge in the M layer or E layer, thus rotating after all centres are solved?

and another thing, half centres isn't the best method every solve right, where sometimes there won't be any bars: in this case is it best to do every centre one by one?

 

[Caden Fisher]

Does anyone have an alg sheet for last cross edge common cases?

 

[ctfx]

Hi...

I need some help...

I just bought a 4x4 cube. I scrambled it and I'm learning to solve it.

I followed this video tutorial (Learn How to Solve a 4x4 in 10 Minutes (Full Yau Method Tutorial).

I already scrambled the cube 4 times and each time I solve it I get one edge wrong (see attached images).

Any ideas on:

1) how to flip this piece to solve the cube

2) What I might be messing up to end up with this result?

p.s. The cube was never disassembled. Its brand new.. I only scrambled it.

Thanks

 

[NigelTheCuber]

Learn the parity alg

r U2 x r U2 r U2 r' U2 l U2 r' U2 r U2 r' U2 r'

 

[xyzzy]

I followed this video tutorial (Learn How to Solve a 4x4 in 10 Minutes (Full Yau Method Tutorial).

You missed the last section of the tutorial.