Questions tagged [rubiks-cube]

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

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5
votes
5answers
983 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 ...
2
votes
1answer
120 views

Can you build a Rubik's Cube? [Part 2]

You are given an disassembled Rubik's cube (Detachable centers,corners and edges). You are then blindfolded. If you assemble the cube while being blindfolded. What is the probability that the cube you ...
6
votes
2answers
2k 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....
9
votes
1answer
1k views

Can you build a Rubik's cube?

Given an all black 3x3 Rubik's cube. You are provided with 54 stickers (9 pieces per color) and then blindfolded. If you put the stickers on the Rubik's while being blindfolded. What is the ...
14
votes
3answers
2k views

Rubik's cube two-person game

I will define the game as follows: There are two players, the "Solver" and the "Unsolver". The Solver's goal is to return the cube to it's standard solved state. Likewise, the Unsolver's goal is to ...
5
votes
0answers
234 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-...
3
votes
1answer
540 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?
2
votes
1answer
2k views

Last layer corners on octagonal cube swapped

I've recently started to dabble into rubik's cubes. For the most part, I've been struggling with a 3x3 octagonal cube. My issue is that I seem to often run into the issue of 2 shaved corners being ...
2
votes
1answer
397 views

How do I fix this Rubik's cube

I finished the cube but got this on 1 side: How do I fix it without ruining it? It is fixable, I did it once but I don't know how I did it.
4
votes
1answer
331 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 ...
12
votes
4answers
893 views

How to determine if a Rubik's Cube is sufficiently scrambled?

Once I solve a Rubik's Cube I obviously want to start again. I just scramble it until it seems to be enough; however, sometimes when I then solve it, I can skip entire steps from the beginner's method....
-3
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2answers
2k views

Rotate corners without affecting bottom and middle layers (3x3)

Is it possible to have an algorithm that can rotate top layer corners on the 3x3. Similar to what R' D' R D does except it is incapable of doing it when more than one of the bottom layer corners is ...
11
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8answers
68k views

Flip edge in Equator layer

If you use the Beginners' Method to solve the Rubik's cube, and solve the equator layer (the layer between the U-layer and D-layer), it can happen that one of the edges is flipped, like this: ...
-1
votes
3answers
596 views

Is this Rubik's Cube position possible?

A solved 3x3 Rubik's Cube has red on the top face, green on the right face, and yellow on the front face. There is one corner piece belonging to these three faces, with those three colours. I want to ...
0
votes
0answers
699 views

Is there a universal algorithm that can solve any Rubik's Cube? [duplicate]

The only reason I ask this is because solving a Rubik's Cube can be frustrating and hard, and for someone who just wants to be able to solve one it would be nice if there was a universal algorithm.
6
votes
1answer
216 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, ...
3
votes
1answer
358 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?
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 ...
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?
-5
votes
1answer
818 views

One Edge Piece Faced The Wrong Way [closed]

What is the minimum number of turns needed to solve a rubik's cube with one edge piece faced the wrong way on the 3rd layer? Example
8
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2answers
1k views

How do I become a sub-15 cuber?

Right now, I can solve a Rubik's Cube with an average of 17 - 20 seconds. Sometimes, I may get 15 or 16 second and my record is 12. I am currently using the Fridrich method and below is how long I ...
3
votes
1answer
738 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 ...
13
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2answers
3k views

How many distinct unsolvable Rubik's cubes exist?

I wanted to answer this question: Why can't I have only one edge piece flipped on a 3X3 Rubik's cube? by saying that it is homomorphic to the illegal state in this question: Why is a ...
21
votes
1answer
4k views

Will tiles on a solved rubik's cube always be in the same position?

When a rubik's cube is solved, will the tiles always be in the same position? For example, if you were to write the number 1-9 on one of the sides before scrambling it, will the numbers always be in ...
-4
votes
2answers
291 views

how to resolve this 3*3 cube

I've followed the beginner's Rubik's cube solving method and I've arrived at this: So as you can see, I've succeeded mounting the first layer but within the second one there's a problem with the ...
30
votes
2answers
1k views

Rubik's Chess Puzzle

This puzzle is part of the Fortnightly Topic Challenge - "Unconventional Tag Fusion". Last week I found out that Puzzle Prime Co. have invented new type of puzzle - Rubik's Chess. The goal is simple -...
2
votes
2answers
381 views

Four flipped edges in the equator layer

Very often I get situation like this: I am interested in manual solving, so automatically generated solution is not useful (like with Kociemba algorithm). Currently I use twice the two edges flip (E ...
14
votes
4answers
2k views

Where is my girlfriend?

Well, I'm really, really sorry to everyone who has spent time trying to tackle this puzzle. I made a HUGE mistake in the presentation. I honestly don't know how I managed to make a mistake this big, ...
0
votes
5answers
671 views

One Hundred Prisoners and a Rubik's Cube

Say there are 100 perfectly intelligent prisoners (who don't have incredibly good memories) who are jailed for life (and also live eternally). The warden decides to play a game with them. There is a ...
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 ...
13
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1answer
504 views

Rubic cube's face into date

Solve this rubic cube's face into date For puzzle masters who can not see pictures / color blind ...
2
votes
1answer
940 views

What are the official rules for generating Rubik's Cube scrambles?

I am writing a program that will keep track of the data I generate from speed-solving Rubik's cubes, and the first component is to generate a scramble. As is stands, my program currently creates a 30-...
5
votes
1answer
471 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 ...
3
votes
1answer
208 views

How to reduce the number of OLL for a Cube

I use Fredrich methods to solve a $3 \times 3 \times 3$ Rubiks Cube but there are almost 54 OLL algorithms and I was wondering if there is a better method with less OLL algortim? When I solve the ...
10
votes
3answers
4k views

How do I memorize parity algorithms for higher-order Rubik's cubes?

I know how to solve a Rubik $4\times4\times4$ or $5\times5\times5$ or bigger, but I have problem with a specific algorithm: the parity error. What's the shortest parity algorithm for $n\times n\times ...
9
votes
1answer
4k views

What's wrong with this parity?

Here you see my Rubik's $10\times10\times10$ I don't know how to solve this using an algorithm, also the same thing happens to my $6\times6\times6$. What algorithm should I use? (The whole cube is ...
2
votes
2answers
472 views

how to shift all 4 corner pieces of the white face by one position

A white face with edge pieces properly oriented but corner pieces mis-oriented by one position: How can I shift all 4 corner pieces of the white face by one position?
0
votes
1answer
2k views

swap two adjacent edge pieces of a white face

Could anyone show me how to swap two adjacent edge pieces of a white face so that the U face is fully aligned? the configuration (real) is as follows:
24
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8answers
5k views

How many cubes can we fit in?

You have a bag with many 3x3 Rubik's cubes . After solving all but one of them, you decide to play a new game. You take the unsolved cube, and start placing solved ones around it. The question: What ...
4
votes
1answer
290 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 ...
12
votes
3answers
7k views

Rubik's cube without any algorithms

I am learning to solve a Rubik's cube using some algorithms (I don't completely understand why they work). I had a Rubik's cube when I was little and I remember solving it 2-3 times without using any ...
3
votes
1answer
29k 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 ...
9
votes
3answers
591 views

Turn 4x4x4 Rubik's Cube into 2x2x2 Rubik's Cube

Idea shamelessly stolen from this question. I have a 4x4x4 Rubik's Cube, but all I want is a 2x2x2 Rubik's Cube. Luckily, I also have an unlimited supply of small pieces of tape. Each piece of tape ...
10
votes
2answers
2k views

3x3x3 Rubik's Cube Illegal State

After I learned how to solve a 3x3 Rubik's Cube and a 4x4 Rubik's Revenge, I began challenging myself to solve the cubes to different states rather than the normal solid sides. For instance, I'd solve ...
8
votes
3answers
524 views

Separating the Pieces of a Rubiks Cube

I recall coming across this problem in one of my classes senior year of high school. (We only did the first part). Easy (and probably somewhere on the internet) Taking a standard 3x3x3 Rubik's ...
9
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6answers
1k views

A 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 each of the $54$ little squares exactly once, and such that the path ...
38
votes
4answers
3k views

Turn 4x4x4 Rubik's Cube into 3x3x3 Rubik's Cube

I have a 4x4x4 Rubik's Cube, but all I want is a normal 3x3x3 Rubik's Cube. Luckily, I also have an unlimited supply of small pieces of tape. Each piece of tape can cover the face of two neighbouring ...
6
votes
2answers
653 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 ...
1
vote
0answers
111 views

Rubik's Cube Master Algorithm [duplicate]

I've been thinking about this question for a while, but I have no idea how to approach it. I don't know what the answer is. The question: What is the shortest finite set of moves that, when repeated,...
15
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2answers
9k views

How do I become a sub-30 cuber?

I am a sub-50 cuber right now. I am currently using the Fridrich method, I take about 2-5 secs to solve the cross and I am learning the 21 PLL algorithms. I am learning one or two PLL every day. I am ...