Questions tagged [rubiks-cube]

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

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3
votes
1answer
182 views

You'll be stuck in this maze, forever (Cubic Cipher)!

Okay, so I mentioned in another puzzle that I created a new kind of cipher, which I refer to as a Cubic Cipher, now that the way to solve it has been established, it's time to ramp things up. As ...
3
votes
1answer
622 views

Axis mirror cube has one centre piece rotated by 90 degrees

In front of me, I have a z axis cube. Sometimes when I scramble and attempt solve it, I end up with one of the centre pieces being rotated by 90 degrees. I know that in principle it is not possible ...
5
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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". ...
9
votes
4answers
471 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 ...
2
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0answers
242 views

What is the next method after 3-style in 3x3 Blindfolded?

I have been using the method 3-style for over 2 years, 3-style and I have settled in the range of 25-30 seconds. I wish to permanently become sub-20, and for that I am planning to undertake the ...
7
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4answers
1k views

How do I solve the top yellow layer of the Rubik's cube?

I used to solve the Rubik's cube using the standard algorithm. Recently, after a long time I tried doing it again. I did revisit the algorithm to solve the Rubik's cube, but I'm stuck in the top ...
1
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2answers
128 views

Chance of getting an “easy scramble” with cross already solved?

I read a blog post recently about the limit of speed-solving records getting to a point that rely on easy scrambles to beat. One of the most obvious head starts would be to get a scramble that already ...
3
votes
1answer
395 views

Can anyone explain me the logic behind a J perm(or similar)?

I learned to solve a Rubik's cube recently by intuition and some basic cube theory (not by myself). At the last step, I use corner 3-cycles and corner rotations to reach the final solved state. I ...
1
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2answers
419 views

Swap Rubiks Cube Corners Diagonally Across

My cube has ended up in a position where I need to swap the corners diagonally across to finish the cube. However to my understanding this is impossible. Is there another way to solve this? I tried ...
19
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5answers
16k views

Is it possible to scramble a Rubik's cube such that no two squares of the same color are touching?

My friend always insists on scrambling my Rubik's cube "perfectly" before giving it to me to solve. According to his definition, a "perfect" scramble must have no three of the same color touching (...
0
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1answer
325 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 ...
0
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0answers
203 views

How do I solve the first phase (corners) of the gear cube when only one corner is out of place?

I got a gear cube and started scrambling with wild abandon. Then I stopped and tried to solve it. I couldn't. I went online to watch YouTube videos. I learnt there are three phases involved in solving ...
7
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1answer
534 views

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 ...
1
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1answer
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?
1
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0answers
112 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 ...
1
vote
1answer
493 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 ...
6
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3answers
2k 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 ...
3
votes
1answer
687 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? ...
0
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2answers
298 views

Easy ways to solve

I learned how to solve a rubik's cube this summer. On my first try (after memorizing all the algorithms) I got a sub-50. Now, my personal best is 31 seconds. I tried learning the Fridrich method but I ...
10
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3answers
36k views

What is the Official notation on rubik's revenge(4x4)?

When solving a 4x4 cube you have specific notation to inner and outer lines, like R = Clockwise outer right and r = Clockwise ...
32
votes
7answers
15k views

Why does the 4x4 Rubik's cube have parity cases, while the 3x3 does not?

I'm a little uncertain as to why these two parity situations occur on the 4x4 Rubik's cube. The first parity case that can occur is this one, where an edge is simply flipped upside down: The ...
3
votes
0answers
81 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 ...
9
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2answers
8k views

What is the shortest known rubik's cube algorithm?

This is related to this question, but different. I'm not asking for the least number of moves needed, nor for pointers on how to use fewer moves. In Singmeister's notes (an 80's book!) there is ...
5
votes
1answer
210 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 ...
0
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1answer
227 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?
15
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4answers
31k views

Is it possible to use one sequence of moves to solve the Rubik's cube from any position?

Is there a sequence of moves that can be repeated over and over again which can solve any legal position the Rubik's Cube? If so what is it, and if there's more than one, what's the shortest? If not, ...
1
vote
1answer
209 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 ...
1
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3answers
671 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 ...
2
votes
0answers
349 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 ...
31
votes
4answers
18k views

Why is a single-corner twist not a valid position on a Rubik's cube?

For those of you familiar with the solution to the Rubik's cube, you will know that a single-corner twist is not a valid position. It can neither be attained by scrambling, nor can it be solved if it ...
1
vote
1answer
408 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 ...
2
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3answers
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 ...
2
votes
1answer
332 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 ...
1
vote
1answer
94 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 ...
0
votes
1answer
276 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 ...
3
votes
2answers
703 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 ...
-4
votes
2answers
612 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 ...
4
votes
3answers
736 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 ...
2
votes
1answer
737 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 ...
9
votes
2answers
2k views

How to get started in speedcubing?

I learned how to solve a Rubik’s cube with the normal beginner method. Now I wanted to know how to get from this to speedcubing. Is speedcubing just executing the steps really fast? I don't think so. ...
9
votes
2answers
20k views

How can I fix “stuck” positions on the Void Rubik's Cube (using the standard beginner's method)?

Sometimes, when solving the Void Rubik's Cube using the standard beginner method, it gets "stuck." What I mean by this is that the top edge of one face and the top edge of an adjacent face's colors ...
5
votes
1answer
489 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 ...
4
votes
2answers
4k 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 ...
2
votes
1answer
336 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 ...
1
vote
1answer
579 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 ...
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 ...
8
votes
4answers
45k views

Swap the edges in a solved Rubik's cube

I have a rubik cube, which always have two swapped edges in the last layer. No matter which color I start with, there are always two edges in the last layer which remained swapped with each other. ...
5
votes
2answers
6k 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/
4
votes
1answer
2k 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 ...
3
votes
1answer
268 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/...