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Questions tagged [rubiks-cube]

For questions about the Rubik's Cube and its variations.

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7
votes
2answers
544 views

How to get faster at 3x3

I am new to speed cubing and would like to figure out how to get faster at cubing based on my personal stats. Which aspect should I focus on? Which principles would be the most useful for me (...
7
votes
1answer
1k views

Is there a Rubik's scramble generator for the top layer only?

I want to practice solving the last layer, but the online scramblers I've seen are full cube only. Is there a Rubik's scramble generator for the top layer only?
7
votes
1answer
2k views

Why can't I have only one edge piece flipped on a 3X3 Rubik's cube? [duplicate]

I was using the beginner method to deliberately solve a 3X3 cube with one edge piece flipped. But, by the time I got to the top I discovered that I couldn't solve it with only one edge flipped. I had ...
7
votes
1answer
472 views

Magnetic Rubik's cube

Forming a 2x2x1 puzzle block, four 1x1x1 Rubik's cubes were modified to attach with one another in many ways by means of magnets and steel discs. Assemble them first so that all sides are showing the ...
6
votes
3answers
27k views

Solving Rubik's cube with one algorithm [duplicate]

I was wondering if it's possible to solve a Rubik's cube just iterating a single algorithm. It doesn't matter how complex the algorithm is (as long as it is less than 1 million moves), nor the time ...
6
votes
7answers
4k views

How can I twist opposite corners on the top face of a 3x3 cube?

I have solved the bottom white layer and the second layer. I have almost solved the top layer also, but I have not able to solve the corner pieces. Normally I can solve this with the below sequence: ...
6
votes
3answers
3k views

Last 2 pieces in Rubik

I followed a guide in how to solve the Rubik Cube however from time ti time I incurr in a case that is not covered by guide and I obtain an almost solved Cube except for 2 pieces. Seems also the ...
6
votes
3answers
4k views

What is the superflip on the 4x4x4 Rubik's cube?

The superflip is the state on a rubik's cube that require the most amount of moves to be solved. This is how it looks like: This state requires 20 moves (where half-turns counts as one move) to be ...
6
votes
2answers
736 views

Can a Rubik's cube be put in a position not solvable by Fridrich's algorithm?

I think today I have faced a bug on rubik's cube. As it should be, I followed the steps Cross and then F2L, instead of OLL algorithms, I used R'FRF' and three corner swapping moves to complete last ...
6
votes
4answers
43k views

Simple 4x4x4 OLL parity algs?

I am learning to solve a 4x4x4 Rubik's cube and I think that the beginner OLL parity alg: (r U2 x r U2 r' U2 l U2 r' U2 r U2 r' U2 r') is a little too complex. ...
6
votes
1answer
204 views

Minimum number of stickers to inspect in a Rubik cube to define a scrambled position?

This is for a robotics solver using a real cube. How many facelets must the machine check to figure out the position of everything in a scrambled cube?
6
votes
1answer
236 views

Another closed path on the Rubik's cube

Is it possible to draw a closed path on the surface of a standard $3\times3\times3$ Rubik's cube such that the path traverses exactly one diagonal of each of the $54$ little squares, and such that ...
6
votes
2answers
2k views

Is solving the Rubik's cube face by face even possible?

Many methods, if not all, recommend solving it layer by layer, but is it actually possible to solve it face by face? If so, explain how you would do this, if not, prove it impossible.
6
votes
1answer
8k views

Maximal number of steps needed to solve 2x2x2 Rubik's Cube

What is the maximal number of steps that a computer (using the fastest algorithm) would need to solve an arbitrary 2x2x2 Rubik's Cube configuration? Are there any other known algorithms that will ...
6
votes
1answer
224 views

Can any Rubik's cube solvable the regular way be solved if you alternate clockwise and counter-clockwise moves?

Let's say you a Rubik's cube that can be solved using a sequences of the 12 standard moves. Can it be solved if you are required to alternate between clockwise and counter-clockwise moves? If not, ...
6
votes
1answer
231 views

$4\times4\times4$ Rubiks cube Top Layer Issue

The only way i am able to solve is to jumble the whole cube again. If you know the way to solve pls give images or algorithm.
6
votes
2answers
3k views

How can I swap opposite corners on the same face of a 2x2 cube?

I've been experimenting with using Y-permutations to solve the 2x2 cube as described here. I ended up with the cube solved but for a single face where the opposite corners were swapped and disoriented....
6
votes
1answer
111 views

Rubik's Scramble Search

Find a scramble which will produce a Rubik's cube fulfilling the following criteria which uses as few turns of faces as possible (Half-Turn-Metric): Each of the six faces show exactly three colours ...
6
votes
2answers
1k views

rubik's cube inside a rubik's cube

Once I completed solving Rubik's cube, a different pattern came into my mind. It was- A B B A B B A C C Here, same letters represent same colors. So is it ...
5
votes
3answers
5k views

What does it mean for a Rubik's cube to be perfectly scrambled, and how do you reach it? Without doing a checker board

Can you picture the perfectly scrambled cube? A Rubik's Cube that's perfectly scrambled? How would it look? Is it even possible? The quest for the Perfect Scramble is now upon us, and I challenge you ...
5
votes
5answers
1k views

What's the minimum number of sequences required to be learn to solve Rubik's cube in under half an hour?

I'm not asking for minimum moves. I know it's 20. I also know that it can be solved using only 1 sufficiently long sequence, but that would take ages to perform and it'd be nearly impossible to ...
5
votes
1answer
531 views

Is there some oil, grease, or substance I can find at home or in the garage or office to lubricate a speed cube?

I'm backpacking around Asia randomly so I won't be ordering anything online. But my speedcube has started to get a bit sticky and I'd like to lube it. So what are some easy to get alternatives to ...
5
votes
1answer
212 views

Can the state of Rubiks cube be determined by viewing it standing on the table (three sides)?

When the Rubiks Cube lies on the table you can see only three sides when you are not moving. Is it possible to calculate all pieces of the cube? In this position, there are only 7 pieces completely ...
5
votes
2answers
7k views

Rubik's cube swapping edge pieces middle layer diagonal

I was wondering if any one knew how to swap 2 diagonal edge pieces. Assume the white squares don't matter. Image generated on https://ruwix.com/online-rubiks-cube-solver-program/
5
votes
4answers
11k views

Rubik's cube 4x4 parity moves

Note: since asking this question I've purchased several other twisty puzzles and now regret taking the "look up algorithms online" approach to solving - in the end I get much more enjoyment from the ...
5
votes
2answers
637 views

What to do when the official Rubik's cube solving sequence breaks?

So, the official guide shows you exactly how to solve the white cross, first layer, etc. but on the second layer, assume you've completed every little square but one (and edge) and that there's 2 ...
5
votes
3answers
2k views

4x4x4 Rubiks Cube strategy

With a 4x4x4 cube, it's possible to apply the same strategies as for a 3x3x3, either treating it as a 3x3x3 with a double-width middle or else as a 2x2x2 and just working on the corner "quadrants". ...
5
votes
1answer
137 views

What (if any) is the maximum possible number of pieces ina Rubik's cube?

What (if any) is the maximum possible number of pieces in a Rubik's cube---27? 64? 125? 216? 343?...or does the maximum end with 125?
5
votes
1answer
226 views

What kind of parity is this? (5x5)

I was just solving my 5x5 cube as always, but at the end I got this configuration and haven't found anything regarding this kind of parity. I am pretty sure all squares are correctly placed and no ...
5
votes
1answer
505 views

Rubiks cube Old Pochman method

I am trying to get a successful blindsolve using the Old Pochman method. I got my cubed scrambled, and I have no idea what to do with memorization when: I need to shoot to a corner that has the ...
5
votes
0answers
251 views

Is there a term for ZZ with CFOP F2L?

CFOP is my preferred method for speedcubing. Recently I thought of learning ZZ. Although recognition of bad edges was difficult, it made F2L a whole lot easier. However I feel that the basic CFOP-...
4
votes
1answer
3k views

Is it possible to scramble a Rubik's cube so that each face has no more than 2 squares of the same color?

So the complete conditions for this scrambled cube can be described alternatively as the following: Each face has less than 3 squares of the same color, which leads to 1a. Each face has 5 or 6 ...
4
votes
1answer
774 views

How to “pop one out” on a Rubik's Cube?

I am trying to follow this tutorial for solving a Rubik's Cube: https://ruwix.com/the-rubiks-cube/how-to-solve-the-rubiks-cube-beginners-method/. Step two says, among other things: If the white ...
4
votes
3answers
809 views

A simple solution for two awkwardly formed corners, is needed

I have been started to learn how to solve rubiks cube with Philip Marshall's ultimate solution. With this algorithm, I can easily solve cage and 6/8 corners, but however two corners comes up in an ...
4
votes
1answer
2k views

How to determine whether a Rubik's cube is solvable

I have a (nearly solved) Rubik's Cube: However, as you can see, one edge only is flipped, making it unsolvable. I have scrambled this unsolvable Rubik's Cube and now it looks like this: And What ...
4
votes
4answers
675 views

Good/Best/fast single algorithm for this situation. Half Superflip

How can I flip the edges in this picture in one algorithm if possible?
4
votes
2answers
5k views

Best cubing algorithm to learn after beginner's

I'm a new fan of cubing. I've recently bought a speed cube and for now I have only mastered the beginner's method and solve it in barely a minute and a half (which is way over what a speedcuber is ...
4
votes
1answer
34k views

Rubik's cube with one disoriented corner [duplicate]

I have been trying to solve Rubik's cube using beginner's method provided here: https://ruwix.com/the-rubiks-cube/how-to-solve-the-rubiks-cube-beginners-method/ I ended up with just one last corner ...
4
votes
2answers
10k views

How to swap the centre squares of a 4x4 Rubik's cube

I'm solving by 4x4 Rubik's cube (aka Rubik's revenge) by reducing it to a 3x3. However, I keep finding that once I've got all the edge pieces paired together I've accidentally moved the centre pieces ...
4
votes
1answer
297 views

Welcome to Cubing

After the critical feedback on the previous question, here is the new question... It so happened that one day, your nephew came to you and said that he wanted you to play a board game with you. You ...
4
votes
3answers
219 views

One corner rotated in 4x4x4

I know that in a 3x3x3 this should never happen (unsolvable state), but is the same true in a 4x4x4? (the rest of the cube is solved) The following answer seems to say that everything about the ...
4
votes
1answer
346 views

What are the minimum OCLL/PLL with ZZ method

I've seen on many sites the information that the LL on ZZ need a minimum of 6 OCLL and 14 PLL. But since the OCLL totals 7, and the PLL totals 21, I don't know which ones are "missing". Is it the ...
3
votes
3answers
989 views

2×2×2 rubik's cube corner is twisted!

Is there a way to solve it? If so how?! I have tried remixing it over and over but I haven't solved it yet :/
3
votes
1answer
190 views

Rubiks Cube 4x4x4 Top Layer Issue - One Edge Pair Flipped

I have trouble with that edge. Please give algorithm or images for solutions for turning it up so that I can form a cross.
3
votes
2answers
780 views

Can a single side of a Rubik's Cube legally contain all possible combinations of colors?

Considering a single side of a standard 3x3 Rubik's Cube, are all possible color combinations attainable? Or are there certain combinations that can only be made by breaking apart the device or moving ...
3
votes
1answer
127 views

Rubik's Cube: Does going from one arbitrary configuration to another have same God's Number as solving it?

Assuming two different (valid) configurations for a Rubik's Cube - A and B - does going from A to B directly have the same complexity as solving the cube? Considering solving a cube can be done in 20 ...
3
votes
1answer
3k views

How can I switch 2 yellow corners that are on the same face from a 3x3 cube?

How can I switch there two corners?
3
votes
1answer
302 views

Theoretical Question - Rubik's Cubes

I have a very basic question on Rubik's Cubes. Take any completely solved cube or skewb. Now pick out (with hand) any two similar pieces and swap their positions, without changing positions/...
3
votes
1answer
573 views

Rubik's cube 4x4x4

I have only two sides that are not right but the other two are right... everything but that has done. How do I complete this 4x4x4 Rubik's cube?
3
votes
1answer
384 views

How do people find more efficient algorithms for cubing? [closed]

I was wondering how people are able to simplify Cubing algorithms. Is there a piece of software or something that brute forces possibilities. Or is there an actual method to this?