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# Questions tagged [rubiks-cube]

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

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### Illegal patterns for the Rubik's cube

It is known that if you take apart the Rubik's cube and then reassemble it randomly, you will end out in one of $12$ cases, among which only one is solvable. The others result in having (1) one piece ...
1k views

### How to swap two edges like this? [duplicate]

Does anyone know an algorithm to swap two edges in this position, without scrambling the first two layers?
360 views

### Unsolvable enigmatic 3x3x3 Rubik's cube?

Haven't seen this problem on any other video or blog post; need help if you feel up to the challenge. So I have finished the 3x3x3 Rubik's cube using the F2L method ... except the top player two ...
4k views

### Can two corners be swapped using commutators?

This question is about solving a Rubik's cube using commutators and conjugates - it is a question about the group theory of the Rubik's cube, rather than a "how do I" kind of question. This video ...
113 views

### How can I become sub-30 speedcuber? [duplicate]

I am young speedcuber (in primary school) and I use Fridrich to solve a cube. I know all 21 PLL algorithms and 7 OLL. My best is 28 sec and average is 39 sec. Do you have any tips that can help me ...
553 views

### Non-reduction methods for solving the 4x4 Rubik's cube

I have a 4x4 Rubik's cube (aka Rubik's Revenge), which I can solve by reducing it to a 3x3 and then solving the 3x3. However, this can result in "parity" cases, where a single edge of the 3x3 is ...
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 ...
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 ...
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 ...
742 views

### What is the right algorithm for orienting the yellow corners. Beginners method 3x3

What is the right algorithm for orienting the yellow corners? Beginners method 3x3 I have tried about 2-3 websites but they don't have the algorithms. Could I have some help with the algorithms? ...
98 views

### Double edge swap 3x3 [duplicate]

So I looked into this a little bit, what's odd is my cube can be scrambled and solved unlike cubes that were assembled or reassembled incorrectly, so they always get this situation. My cube is a ...
678 views

Alice needs a strong password, but she has terrible memory - so she have decided to hide it in a Rubik's cube she happens to carry around all the time Alice starts with a solved 5x5x5 Rubiks Cube She ...
513 views

### What are some benefits of solving the rubiks cube?

I was wondering what are some benefits of speed solving for the person involved in this hobby? I am looking for the information regarding the cognitive benefits of solving the rubiks cube. I found ...
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 ...
5k views

### Rubik's cube with twisted corner

So I was messing around with my newest Rubik's cube, and I apparently twisted a corner when solving it, and now I don't know what corner it was. If there is someone out there that knows how to ...
786 views

### Is my 5x5 cube on an “illegal” position?

I've never met this postion before, and i'm starting to think it's an "illegal" one because i lend it to a friend before and he said he had to glue some fallen stickers. Am i missing an alorithm or do ...
238 views

### Is there a method in speedsolving without f2l?

I use the beginners method to solve the Rubik's cube and solve it in 50 seconds. Is there any way to solve it without F2L?
440 views

### Rubik's cube - Ideal solution book - Rubik's maneuver

I did a search here, but didn't find any references to the 1981 "The Ideal Solution" booklet, which was one of the early solution guides for a 3x3x3 cube. There was also a 1982 Ideal solution booklet ...
2k views

### Simplest Rubik's cube “algorithm” with cycle length 3

A regular Rubik's cube has a staggering number of possible states. However, that number is most decidedly finite; after all, a quintillion is just as far from infinity as seven is. From this ...
363 views

### Dayan speed cube 3x3x3 all corners twisted?

I have solved 3x3x3 cubes as well as 4x4x4, 5x5x5, 6x6x6, 7x7x7 and the megaminx from some time now but this one is really bugging me. I won't consider my self an expert but I have not experienced ...
95 views

### Possible to expose each legal position of rubiks cube?

Is it possible (theoretically, of course) to expose each legal rubik's cube position only once with a single sequence of quarter-turn and half-turn moves? Assume a 3x3x3 cube, and ample computing ...
1k views

### Swap diagonally opposite corners of one face without changing orientation and without affecting rest of cube?

I'm not even sure if it's possible to do this or not. I have a hypothetical PLL-situation where I need to swap one opposite-corner pair of a single layer. Like, a V-perm but without moving the edges:...
312 views

### Is there a name for this Rubik's cube algorithm?

$RUR'U RU2R'$ I use this algorithm to: permute UL and UF edges (messing up corners) orient LL from a fish (possibly using its mirror) orient pairs of LL corners by combining above algorithm with its ...
763 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 ...
794 views

### 3x3x5 Rubiks Cuboid: Swapping Adjacent Edges

I have a 3x3x5 cuboid in the position shown (all pieces correct except for the two edges you can see. The must be a parity issue, but I can't get around it whatever I try. The only parity issue that ...
41k 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. ...
646 views

### Sub-30second solving the $3\times3\times3$ Rubik's cube

I just wanna learn cubing under 30 secs. Please help me:( As i've already learned the Beginner's method. Is there any easiest way to learn the CFOP method as i am unable to understand this method. I ...
5k views

### Is twisting a corner of a Rubik's cube a valid move?

I believe the question is self-explanatory but I'm asking the question in different contexts. I understand that it makes the 3x3x3 unsolvable if you twist a single corner but there are cases where it ...
38k views

### How can one solve a Rubik's cube without relying on guides/algorithms?

I am wondering who is able to solve Rubik's cube just by thinking without knowing the rules behind it. As far as I know the inventor Ernő Rubik was professor of architecture and he intended to help ...
629 views

### Rubik's cube: Last edge problems (beginners method)

When solving the Rubik's cube using the beginners method, the last step which solves the last layer edges only requires 1 step of the algorithm if one face is already completed. My problem is that ...
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 ...
352 views

### Solve 5 last corners in 4x4x4

OK, so I'm trying to solve this 4x4x4 cube with least possible memorized algorithms. So first I follow the basic conversión to a 3x3x3 configuration, and then I used some Pitrus method, so I build a ...
4k views

### Rubik's cube: rotate 2 opposite corners

Is there an faster algorithm to rotate 2 opposite corners? I can't find anything else but doing the sexy move multiple times.
351 views

### How many known distance-20 positions are found so far for the Rubik's cube in half-turn metrics?

This site says: "All 93,659,370 known distance-20 positions as of 18 March 2014 are available below." And in total there are about 490 millions of them. This information is 3 years old. Does anybody ...
217 views

### When will inverting an algorithm allow it to function the same as the original?

Let's say I have this zperm algorithm: R' U' R U' R U R U' R' U R U R2 U' R' U2 Now, let's suppose I invert it. U2 R U R2 U' R' U' R U R' U' R' U R' U R Assuming the cube is in a state of its pll ...
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 ...
671 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?
297 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/...
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: ...
121 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 ...
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 ...
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....
14k views

### How to Flip Adjacent Edges like this

Only these two edges are misplaced. Any algorithm to solve this?
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 ...
249 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-...
568 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?
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 ...
413 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.