Questions tagged [rubiks-cube]

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

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86 views

Randomly solving a rubik’s cube with only one face given

Given only one face of the rubik's cube, is there any way to form the other faces randomly so we end up with valid solvable configuration? Let’s suppose that I have an input which is only one face of ...
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1answer
142 views

Help to solve rubik cube 3*3*3

How to solve my rubik? Which pattern left?
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1answer
130 views

Rubik's cube invalid state? Yellow cross starts with odd number of edges

In solving a Rubik's cube, I've been following the standard beginner instructions. I'm now trying to get the "yellow cross" step done (on the blue side, because I started with solving green), but I ...
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1answer
647 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 ...
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2answers
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:...
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1answer
2k 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?
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1answer
491 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 ...
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1answer
687 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 ...
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1answer
223 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 ...
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1answer
228 views

What order should I learn CFOP in?

I have been solving the 3x3 using the beginners method for about 2 and a half months and I was wondering what order I should learn CFOP in. I was thinking of learning advanced f2l first and then oll ...
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1answer
126 views

Misaligned Cube: How to fix? [duplicate]

There must have been an accidental turning of corners. Now, I do not know how to turn corners, so that the cube is solvable again. The red and blue edges are the only misaligned pieces.
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1answer
156 views

Identifying this cube

I have a MoYu cube that goes quite well, but I am unsure what model it is. I have looked everywhere, but to no avail. Pictures for the cube and its insides have been provided. Thanks in advance! (...
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2answers
157 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 ...
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1answer
96 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 ...
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0answers
59 views

Twisted rubiks cube [duplicate]

I have a rubiks cube with two wrong corners. How should I twist it back to get the right orientation?
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0answers
115 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 ...
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0answers
129 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,...
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3answers
969 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 ...
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2answers
4k views

Rubik's cube 19 move Solution [closed]

All Rubik's cube positions can be solved in 20 moves or less; http://www.cube20.org/ What's one such position that requires 19 moves to solve, please give the faces, and the moves to solve.
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5answers
754 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 ...
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1answer
161 views

I don’t know how to solve the last pieces

So, I almost finished a rubik’s cube, but the last 3 pieces are not in their places (green on red face, blue on green face, and red on blue face). Apart from these, the other faces are done. How can ...
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1answer
345 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 ...
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1answer
197 views

What is “God's Number” for Specific CFOP Algorithms on the 3X3 Rubik's Cube?

CFOP: What is God's Number for PLL and OLL Algorithms? I have been "speedcubing" on and off for 5-6 years now using CFOP and throughout my experience have come across many different algorithms for ...
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2answers
48 views

Rubik's cube from solved to specific pattern

Say I don't want to solve Rubik's cube but I want the reverse: I'm having a solved Rubik's cube (all stickers in it's right position and orientation) and I want to go from this state to a specific ...
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1answer
128 views

Rubiks cube 2 look PLL - name of this algorithm?

I'm currently learning 2-look PLL and came across this pdf with some algorithms: https://www.cubeskills.com/uploads/pdf/tutorials/4-look-last-layer.pdf I went through and gave names to the algorithms ...
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1answer
1k views

3rd layer dilemma

i've followed the beginner's method, i've got the superior facet correct, the 1st and the 2nd layer correct. But in the third layer i always invert the colors but only got one corner right as shown in ...
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1answer
420 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 ...
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1answer
243 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?
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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:
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2answers
303 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 ...
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1answer
114 views

How to flip top row center pieces on a 4x4x4 Rubik's cube? [duplicate]

I'm trying to solve a 4x4x4 Rubik's cube by first reducing it to 3x3x3 and I'm stuck in the end. I've completed all sides, matched all corners, but two pieces remain and I can't figure out how to flip ...
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0answers
76 views

Can this Rubik's cube be solved? [duplicate]

All sides of the Rubik's cube are solved, except the corners. And these corners need to be swapped.
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0answers
69 views

How to Move two Horizontaly opposite edges on Rubik's Cube [duplicate]

I solved my 3x3 Rubik's cube, but then saw that two pieces were flipped and needed to be moved to the other pieces' spot. I have looked for solutions ,but they all are only about different spots. I ...
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0answers
62 views

A Rubik cube question [duplicate]

I have seen professionals solving Rubik cube they are very fast. I can also solve the cube but I take 1 minute . How to solve it in minimum time is there any algorithm or just practice. Tell me some ...
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0answers
200 views

Best strategy for Multiple Blindfolded 3x3 Rubik's Cube event (WCA)

The MBLD event is quite hard on the technique and the memory , testing the 3x3 Blindfolded method. The cube placement strategy as discussed by few officials stand at : Cube Placement The other ...
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0answers
224 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 ...
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0answers
728 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.
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3answers
600 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 ...
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1answer
376 views

How to cycle these 3 minicubes on a Rubik's cube?

Someone has fiddled with my Rubik's cube and messed it up only very minorly. Exactly 3 minicubes are out of place: the up-front, up-back, and down-front edge minicubes need to be cycled round. I ...
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1answer
2k views

How to solve Rubik's Cube using mathematical formulas? [closed]

I am trying to solve Rubik's Cube, but it took one month for me when I started. Are there any mathematical formulas, rules and tips for solving Rubik's Cube in less time (i.e. minutes)?
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1answer
1k views

One corner piece orientation problem - Rubik's Cube [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 ...
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1answer
2k views

What is th GAN 356 X VIP card for? [closed]

I have looked all over the internet but can not find answer to my question. Can someone please help me?!
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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 ...
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2answers
299 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 ...
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2answers
689 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 ...
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1answer
942 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