4x4x4 frustration

[Nestor]

I received my puzzles from popbiying 2 days ago and I've been going around with them. I figured out parity for the void 3x3x3, solved the mirror blocks in a few minutes and decided to move on to the Revenge cube.

I made a promise to also solve it without any external help or guides and after 10 hours and several approaches I solved it.. Except for the parity case I ran into where two pieces would ne flipped. Since I failed to resolve the parity, I solved the cube FOUR additional times, only to run into parities on each case. just as I'm venting my frustration with my wife and i swear out loud to have it solve today my cubes slips from my hand and splatters with two broken pieces.

Dam I hate this day.

 

[Senkoy]

Sorry to hear that man. What kind of cube was it? Eastsheen, Maru?

 

[xFear of Napalm]

depending on what type of cube, it might be fixed. you should have looked online for the algorithm, because it's not really cheating. thats what everyone does, because parity on 4x4x4 would require about an i.q. of Albert Einstein.

 

[hawkmp4]

Well, if you can repair the cube, you have a 1/2 chance each solve of getting orientation parity. Do enough solves, and you'll end up getting one without OP.

If you're looking for a quick, easy to memo parity fix...

Spoiler

(Rw U2)*5 and then resolving the edges will fix odd orientation parity.

 

[Christopher Mowla]

because parity on 4x4x4 would require about an i.q. of Albert Einstein.

This is a misconception that delayed everyone from finding out that common parity algorithms are actually based on a simple idea. I am the first to figure out how these algorithms work and have created entirely different parity algorithms, but I don't think I am Albert Einstein.

See this thread for more details.

 

[Nestor]

Popbiying lists it as a QJ cube... It kind of locked up a bit buy moved nicely. I think I can superglue both pieces (central ones,broken L piece in both cases).

And the reason I didn't look for the parity alg. Is that I really wanted to be able to say I fully did it on my own... I just had no idea tha parities where so freaking common in this cube and kept hoping for a clean perm.

 

[hawkmp4]

Popbiying lists it as a QJ cube... It kind of locked up a bit buy moved nicely. I think I can superglue both pieces (central ones,broken L piece in both cases).

And the reason I didn't look for the parity alg. Is that I really wanted to be able to say I fully did it on my own... I just had no idea tha parities where so freaking common in this cube and kept hoping for a clean perm.

Well, the chance for orientation parity and the chance for permutation parity are independent, and 1/2 each. So chances are, if you do 4 solves, 1 one of them will have no parity.

 

[TrollingHard]

Yep, I had the same cube. Decent cube, but breaks so easily.

May I suggest a Maru 4x4, or perhaps a Mefferts 4x4? They are good.

Keep at it, you'll get it eventually!

 

[Rosette]

Well there are 3 parity cases in 4x4 so

it's pretty hard not to get any of them

 

[hawkmp4]

Well there are 3 parity cases in 4x4 so

it's pretty hard not to get any of them

Three? Oh reaaaalllly?

 

[Rosette]

Well there are 3 parity cases in 4x4 so

it's pretty hard not to get any of them

Three? Oh reaaaalllly?

Orientation parity, permutation parity

and adjacent(?) parity(Right before 3x3 stage)

or am i wrong

 

[Hyprul 9-ty2]

You mean "edge pairing parity"? :S

 

[Rosette]

yeah yeah that

 

[hawkmp4]

Well there are 3 parity cases in 4x4 so

it's pretty hard not to get any of them

Three? Oh reaaaalllly?

Orientation parity, permutation parity

and adjacent(?) parity(Right before 3x3 stage)

or am i wrong

Are you referring to when two centres are switched? Like, blue and green centres are next to each other on a standard colour scheme cube?

Permutation and orientation parity are the only 'parity' situations on a 4x4 cube.

 

[Rosette]

This

and yes im not an artist

 

[Tone]

within the first hour of getting my mini qj 4x4 one of the triangular pieces on the ball mechanism broke off. it was unbelievable. i didn't want to spend another 14 dollars and wait another 4 days but i had no glue or other choice. i looked closely at the piece and saw a small peg that fit into a hole and that with some kind of glue a simple fix would suffice. a few hours later i had a bright idea. i heard all over that too much silicone would act as glue, so i took my crc silicone spray and the mechanism and barely pushed on the button to let only liquid out as it filled the crevise, and placed the triangle on after a small squirt on that. a few seconds later it was sticking and after a little while i felt it was safe enough to assemble. to this day i think its the most sturdy part of my qj

 

[irontwig]

Well, if you can repair the cube, you have a 1/2 chance each solve of getting orientation parity. Do enough solves, and you'll end up getting one without OP.

If you're looking for a quick, easy to memo parity fix...

Spoiler

(Rw U2)*5 and then resolving the edges will fix odd orientation parity.

I know an even easier parity alg:

Spoiler

u

 

[hawkmp4]

Yes, that changes parity of edge permutation...
But that's not really useful in a solve. The algorithm I gave preserves most edges and and all centres. While the algorithm you gave does change the parity of edge permutation, one has to find a way to resolve the centres without changing the parity back.

 

[M4rQu5]

This

and yes im not an artist

There isn't a parity like this.

 

[Kirjava]

Well there are 3 parity cases in 4x4 so

it's pretty hard not to get any of them

These are the parity cases in the reduction method. Saying the 4x4x4 has these parities is like saying the 3x3x3 has parity.

Yes, that changes parity of edge permutation...
But that's not really useful in a solve.

Ever used sandwich?