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40 votes

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

There are three techniques that allow you to come up with useful move sequences for solving a cube. Conjugation This is where you already have a move sequence that does one thing and allows you to ...
Jaap Scherphuis's user avatar
31 votes
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A weird deleted Puzzling.SE question

Please upvote the other answers as well. ffao solved half of the ciphers on his own, and dcfyj solved the cube shortly before I did. Starting position Rotations Orange Solved by ffao Yellow ...
Sleafar's user avatar
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23 votes
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Wooden Snake Puzzle

I have the same snake cube puzzle, except that its cubes don't alternate in colour. On mine they are coloured so that the finished cube consists of 2x2x2 blocks. Drawing of the solution is under the ...
Jaap Scherphuis's user avatar
22 votes
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Does this metal puzzle have a solution (Baguenaudier)

This puzzle is called a "Baguenaudier" which is French for "Time Waster". This solution assumes that you are holding the handle end on the left. The rings are numbered from right to left starting at ...
LeppyR64's user avatar
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20 votes
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General strategies for solving metal disentanglement puzzles

In the classic book "Winning Ways (for your mathematical plays)" by Berlekamp, Conway and Guy there is a small section devoted to wire puzzles (like the Tavern puzzles) in the second-to-last chapter. ...
Jaap Scherphuis's user avatar
19 votes

A weird deleted Puzzling.SE question

After the rotation step, the gimmick is that The white face reads The red face reads The orange face reads
ffao's user avatar
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18 votes
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Adjusting wrongly assembled Rubik's Cube

There is never a particular piece that is the wrong one, but you can find out how to fix it. There are three conditions that a solvable position must satisfy. The permutation parity must be even. ...
Jaap Scherphuis's user avatar
17 votes

Does this metal puzzle have a solution (Baguenaudier)

This can be solved in 16 steps. Lets use binary here, 0 is off, 1 is on the handle You start with 11111 1 - Remove the first ring to get 01111 2 - Remove the third ring to get 01011 3 - Put back the ...
Beastly Gerbil's user avatar
17 votes

A weird deleted Puzzling.SE question

This is mostly to help others in the process as I'm awful at decrypting ciphers. So After some poking around I figured out that and while chatting with the OP we realized that Before all of that ...
dcfyj's user avatar
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15 votes
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Rubik's Chess Puzzle

Sleafar's user avatar
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15 votes
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Consecutive Towers of Hanoi

Here is a revised solution, for... ...which  (again) seems like the maximum to me.  has been verified by Molhan as being maximal.   Trivial steps have been condensed. These ...
humn's user avatar
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14 votes
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The Amazing Sliding Crossword

The solution to the crossword is: And this can be arranged as: My strategy: But is this solvable as a 15-puzzle? An explicit solution:
Deusovi's user avatar
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14 votes
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Prove why this mechanical linkage for a triangle centroid works

The proof is in two parts, corresponding to the two linkages which are joined to each other at a single point. For each part, I'll try to both explain in words and illustrate on the picture you've ...
Rand al'Thor's user avatar
13 votes

Puzzle similar to 15-puzzle but more moveable pieces?

As answered by @BeastlyGerbil, you have the world of twisty puzzles. Here in the Twisty Puzzle Museum you can find over 5,000 of these kind of puzzles, and here is my personal collection of currently ...
Kevin Cruijssen's user avatar
13 votes

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

Logic Every method for solving a Rubik's Cube comes down to algorithms at some stage. These algorithms are a set of moves which you memorise and perform when a set of criteria is met. For example, ...
Aric's user avatar
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13 votes

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

I can speak as someone who solved the Rubik's cube "without knowing the rules behind it". I solved it by myself, when I was in high school, with no instruction beyond watching some guy solve it one ...
alexis's user avatar
  • 291
13 votes
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1+3 Towers of Hanoi

From this we get the recursion formula with solution UPDATE As @PM2Ring points out in the comments there is a prettier way of writing the closed formula: The first few values are
Albert.Lang's user avatar
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12 votes

Puzzle similar to 15-puzzle but more moveable pieces?

Kevin Cruijssen gives some good examples. You might also want to consider multiple layers as a part of the puzzle, which allows you to have additional constraints, either visible or hidden. For ...
bkuehner's user avatar
  • 456
12 votes

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

You should try silicone spray aerosol, you should be able to find it in any hardware store. It seems my answer is too short, so I'll add a little poem, I hope it will please you guys. ...
ThEBiShOp's user avatar
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12 votes
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RIDDÅL - another unfinished flat-pack puzzle

Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Finally
Wesley Situ's user avatar
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12 votes
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Can two colors ever be orthogonally adjacent in a flexi puzzle?

I think: Because: Then: Now: Since: We can conclude: But then because: We observe that: I.e.:
boboquack's user avatar
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12 votes

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

I haven't solved the 3x3x3 Cube myself. I bought mine in 2010, and used a tutorial to solve it. In 2012 I started a twisty puzzles collection, and I currently have more than 350 puzzles in my ...
Kevin Cruijssen's user avatar
12 votes
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Barrel - Part 2

Here's my attempt (maybe I'll get graphical when I have the time, text only for now.) First, label the non-dynamite barrels like this: and develop a notation: <Barrel name>-<direction> means ...
Bass's user avatar
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12 votes
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How to make a Rubik's Cube look like a die?

I will assume that the pips of a number do have to be the same colour, with the background an arbitrary mix of the other 5 colours, and that the six numbers must be on six different faces (e.g. you ...
Jaap Scherphuis's user avatar
11 votes
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Is there a common way to solve tetris like cube puzzles

There isn't, and it's been mathematically proven that there isn't. It's clear that, say, 2-dimensional assembly puzzles, and jigsaw puzzles, are simpler special cases of this three-dimensional ...
ais523's user avatar
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11 votes
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A colorful wheel

While the solution of the tower of Hanoi also applies to this puzzle, there is a shorter solution! For more details you can look at the Hanoi page on my website.
Jaap Scherphuis's user avatar
10 votes
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Make a tetrahedral pyramid with these puzzle pieces.

The way to assemble this is in the following order : ... ... ... ... ... ... ... ... Picture to follow
APrough's user avatar
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10 votes
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How to Flip Adjacent Edges like this

Why so complicated? You can use even a simpler combo. First, move the other flipped edge to the opposite side. If BLUE is Front and ORANGE is Left do: Moving the orange edge to the opposite side: L',...
Jazzer's user avatar
  • 216
10 votes

Frequentists be damned! Design an evil coin to prove a point

Frequentists won't be damned. This is a trick question. In looking at making a coin, you can't bias it by weighting. There is an entire class on such myths and methods of bias at Berkley (at least ...
Keeta - reinstate Monica's user avatar
10 votes
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Barrel - Part 5

Not required to do it in the minimum number of moves, eh? Well, "Inefficient" is my middle name! Actually, it's 'Pink', but whatever. Let's build a horribly inefficient solution by first making some ...
ManyPinkHats's user avatar
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