Speedsolving.com Wiki - User contributions [en]

Talk:Try-out Methods

2008-08-30T00:45:46Z

Badmephisto:

Perhaps rename this "Experimental Methods"? I don't like the current phrase.
:I agree, that would make more sense. (append four tildas to your messages to sign them) [[User:Badmephisto|badmephisto]] 00:44, 30 August 2008 (UTC)
:Or something like "Methods in development" ? I dont know [[User:Badmephisto|badmephisto]] 00:45, 30 August 2008 (UTC)

Talk:Try-out Methods

2008-08-30T00:44:04Z

Badmephisto:

Fridrich Method

2008-08-29T01:32:48Z

Badmephisto: I'm so confused. Why did I think this was a beginner's method page? god

The '''Fridrich Method''', popularized by [[Jessica Fridrich]], is similar to the [[Layer-By-Layer]] (LBL) method, because some of the steps are the same. However, the full Fridrich method uses many more algorithms than the layer by layer method, and combines some steps from the LBL method into one step. A very large number of people use this method, so there's a huge support network, and almost everyone will be able to help with learning it. The vast majority of the fastest cubers use this method (although that does not mean this is the only fast method).

==The Steps==

1. '''Cross'''

First, make a cross on any side of the cube. This entails solving all of the edges with a given color to their proper positions.

2. '''F2L (First Two Layers)'''

In this step you fill in the slots where the corners of the cross are missing. For each insertion, a corner and an edge are placed simultaneously. There are 41 basic cases for this step, but it can be learned intuitively.

3. '''OLL (Orient the Last Layer)'''

Next, you make the entire top side of the cube a solid color. This requires 57 algorithms, but can be broken down into two steps (2 Look OLL), which only requires 9 algorithms.

4. '''PLL (Permute the Last Layer)'''

Finally, you finish the cube by permuting the top layer of the cube. There are 21 algorithms to learn, but this step can be done into two steps, (2 Look PLL), which includes just 6 algorithms.

==Pros==

This method is relatively easy to understand when compared to other methods. Therefore, it is the most tested and most popular method used. It has a reasonable number of algorithms to learn, and sub 15 second averages are definitely possible.

==Cons==

Learning all of the algorithms takes some time, and it requires a lot of practice to solve the F2L consistently in 10 seconds or less. Also, it has a slightly higher move count when compared to block building methods.

==Where to learn the Fridrich (CFOP) method==

* [http://www.solvethecube.co.uk/ Joël van Noort's tutorial]
* [http://erikku.er.funpic.org/rubik/ Erik Akkersdijk's tutorial]
* [http://www.cubefreak.net/speedcubing.html Shotaro Makisumi's tutorial]

Note: Written by the members of the speedsolving forum in this thread: http://www.speedsolving.com/forum/showthread.php?t=3688 - Posted by Rubik's Cube Fan

Fridrich Method

2008-08-29T01:29:20Z

Badmephisto: /* Where to learn the Fridrich (CFOP) method */

The '''Fridrich Method''', popularized by [[Jessica Fridrich]], is similar to the [[Layer-By-Layer]] (LBL) method, because some of the steps are the same. However, the full Fridrich method uses many more algorithms than the layer by layer method, and combines some steps from the LBL method into one step. A very large number of people use this method, so there's a huge support network, and almost everyone will be able to help with learning it. The vast majority of the fastest cubers use this method (although that does not mean this is the only fast method).

==The Steps==

1. '''Cross'''

First, make a cross on any side of the cube. This entails solving all of the edges with a given color to their proper positions.

2. '''F2L (First Two Layers)'''

In this step you fill in the slots where the corners of the cross are missing. For each insertion, a corner and an edge are placed simultaneously. There are 41 basic cases for this step, but it can be learned intuitively.

3. '''OLL (Orient the Last Layer)'''

Next, you make the entire top side of the cube a solid color. This requires 57 algorithms, but can be broken down into two steps (2 Look OLL), which only requires 9 algorithms.

4. '''PLL (Permute the Last Layer)'''

Finally, you finish the cube by permuting the top layer of the cube. There are 21 algorithms to learn, but this step can be done into two steps, (2 Look PLL), which includes just 6 algorithms.

==Pros==

This method is relatively easy to understand when compared to other methods. Therefore, it is the most tested and most popular method used. It has a reasonable number of algorithms to learn, and sub 15 second averages are definitely possible.

==Cons==

Learning all of the algorithms takes some time, and it requires a lot of practice to solve the F2L consistently in 10 seconds or less. Also, it has a slightly higher move count when compared to block building methods.

==Where to learn the Fridrich (CFOP) method==

=== Video Tutorials ===
* [http://www.youtube.com/watch?v=ofZFUgaxlTQ Badmephisto's YouTube tutorial (3 videos)]
* [http://www.youtube.com/view_play_list?p=6CD08F940E40DCDB RobH0629 has a long detailed video (7 videos total)]

=== HTML Tutorials ===
* [http://www.solvethecube.co.uk/ Joël van Noort's tutorial] teaches what is probably the best beginner's method, because it will allow you to easily transfer into Fridrich method.
* [http://erikku.er.funpic.org/rubik/ Erik Akkersdijk's tutorial]
* [http://www.cubefreak.net/speedcubing.html Shotaro Makisumi's tutorial]

Note: Written by the members of the speedsolving forum in this thread: http://www.speedsolving.com/forum/showthread.php?t=3688 - Posted by Rubik's Cube Fan

Fridrich Method

2008-08-29T01:22:07Z

Badmephisto: /* The Steps */

The '''Fridrich Method''', popularized by [[Jessica Fridrich]], is similar to the [[Layer-By-Layer]] (LBL) method, because some of the steps are the same. However, the full Fridrich method uses many more algorithms than the layer by layer method, and combines some steps from the LBL method into one step. A very large number of people use this method, so there's a huge support network, and almost everyone will be able to help with learning it. The vast majority of the fastest cubers use this method (although that does not mean this is the only fast method).

==The Steps==

1. '''Cross'''

First, make a cross on any side of the cube. This entails solving all of the edges with a given color to their proper positions.

2. '''F2L (First Two Layers)'''

In this step you fill in the slots where the corners of the cross are missing. For each insertion, a corner and an edge are placed simultaneously. There are 41 basic cases for this step, but it can be learned intuitively.

3. '''OLL (Orient the Last Layer)'''

Next, you make the entire top side of the cube a solid color. This requires 57 algorithms, but can be broken down into two steps (2 Look OLL), which only requires 9 algorithms.

4. '''PLL (Permute the Last Layer)'''

Finally, you finish the cube by permuting the top layer of the cube. There are 21 algorithms to learn, but this step can be done into two steps, (2 Look PLL), which includes just 6 algorithms.

==Pros==

This method is relatively easy to understand when compared to other methods. Therefore, it is the most tested and most popular method used. It has a reasonable number of algorithms to learn, and sub 15 second averages are definitely possible.

==Cons==

Learning all of the algorithms takes some time, and it requires a lot of practice to solve the F2L consistently in 10 seconds or less. Also, it has a slightly higher move count when compared to block building methods.

==Where to learn the Fridrich (CFOP) method==

* [http://erikku.er.funpic.org/rubik/ Erik Akkersdijk's tutorial]
* [http://www.solvethecube.co.uk/ Joël van Noort's tutorial]
* [http://www.cubefreak.net/speedcubing.html Shotaro Makisumi's tutorial]

Note: Written by the members of the speedsolving forum in this thread: http://www.speedsolving.com/forum/showthread.php?t=3688 - Posted by Rubik's Cube Fan

3x3x3 Speedcubing Methods

2008-08-29T01:20:32Z

Badmephisto: im not aware of anyone who actually uses it and gets really good times. Theoretically seems to be the right word there

Because of the popularity and relative simplicity of the 3x3x3 cube, there are a large number of methods out there. The most common and fast will be explored in this article.

== Basic Methods ==

Basic methods require very few algorithms and little practice, but they also have a high move count and are very difficult to get fast times with. These methods are good for teaching people who have never solved a Rubik's Cube before.

In the ''[[Layer-By-Layer]]'' method, the solver finishes the layers one at a time: the first layer, edges then corners; then the second layer edges; and finally the last layer. This is the most common method for new cubers to discover on their own.

In the ''[[Corners First]]'' style, the corners are all solved, and then the edges and centers are filled in. This is a very easy method to learn, and it has many variations.

== Intermediate Methods ==

Intermediate methods are very popular because they are quite fast without requiring extensive knowledge or memorization. They have a moderate move count (although they can be heavily optimized) and are good for cubers who have mastered a basic method.

The ''[[Fridrich Method]]'' is the most popular speedcubing method. First the bottom layer edges are solved, then the first two layers are filled in either using intuition or slotting in each corner edge pair using one of 41 "algorithms", and finally the top layer is oriented and permuted in seperate steps using one each of 21 PLL's and 57 OLL's.

The ''[[ZZ Method]]'' is a variation of Fridrich where the edges are all oriented in the first step, allowing for more fingertricks and fewer cube rotations.

The ''[[Petrus Method]]'' is the second-most popular speedcubing method. The cuber creates a 2x2x2 block and expands it to a 2x2x3 block, then orients all of the remaining edges and finishes the first two layers with U and R turns only. Finally the last layer is finished in three steps. Most Petrus users finish the last layer in two steps using OLL then PLL.

The ''[[MGLS Method]]'' is another way to deal with the transition between F2L and LL. After the F2L minus a corner-edge pair has been created (this first part can be done with Fridrich, Petrus, Heise, etc.), there are three algorithmic steps: insert the F2L edge and orient the LL edges, insert the F2L corner and orient the LL corners, and then [[PLL]].

The ''[[Roux Method]]'' is a hybrid block-building and corners first method. Two opposite 1x2x3 blocks are made; then, the last four corners are solved, and the last six edges are finished off intuitively.

The ''[[Waterman Method]]'' is an efficient method based on corners first methods. The cuber first finishes the first layer, then does the opposite layer's corners, and finally finishes the remaining edges in three steps.

== Advanced Methods ==

An advanced method requires extensive memorization, understanding of intuitive blockbuilding, or both. Few people have ever mastered these methods, but they are theoretically capable of extremely low move counts and times.

The ''[[Heise Method]]'' is a very tricky block-building method that requires no algorithms at all. Four 1x2x2 blocks are created, and then paired up to finish all of the F2L minus two pieces, while also orienting the last layer edges. Then two corner-edge pairs are made and all of the edges are solved along with two corners. Finally the three remaining corners are finished with a commutator.

The ''[[ZB Method]]'' is an extension of Fridrich which requires hundreds of lengthy algorithms. After solving the F2L minus a corner-edge pair, the cube is finished in two algorithms: first the cuber finishes the F2L while orienting the LL edges, and then the cuber solves the entire LL in one step.

Road to Sub-15 Second Averages

2008-08-28T21:02:28Z

Badmephisto: /* Using the Fridrich Method */

Here we present some ideas as to how to break 15 seconds consistently with the Fridrich method.

== Using the Fridrich Method ==
Reaching 15-second averages may be obtained via the following tips -- to be performed in chronological order.

# [[Beginner's Methods|Beginner's Method]]
#* First learn how to solve the Rubik's cube using a tutorial, such as one in the [[Beginner's Methods]] section.
#** Tip: Solve with your cross on the bottom! It ''will'' help you out later.
#* Learn how to [[Lubrication|lubricate]] your cube.
#* Use a timer, such as an [[Web-based Software#Web-based Timers|online timer]] or a [[PC Software#Standalone Timers|PC timer]] to see your progression.
# Learn [[2-look OLL]] algorithms.
# Learn [[2-look PLL]] algorithms.
# Learn to do the [[F2L| First Two Layers (F2L)]] efficiently.
#* Use a tutorial, such as [http://ca.youtube.com/watch?v=k-xbcAMfWwM Badmephisto's YouTube Tutorial on F2L].
#* Your times will temporarily get worse, but after a few weeks of practicing, they will rapidly become better.
#* Practice F2L -- practice a lot. There is no way around F2L, and you will have to master it to get very fast.
# Learn full (1-look) [[PLL]].
#* 21 algorithms to learn.
#* At this point, consider buying a [[Cubes#Cubes|DIY Cube]]. Assuming look-ahead is good, focusing on speed might be important now.
# Learn full (1-look) [[OLL]].
#* 57 algorithms. Don't learn them too quickly, otherwise recognition will be impeded upon. But don't learn them too slowly; try to learn ''consistently''. Steady, slow or fast, will always win the race.
# Look into [[advanced F2L techniques]], such as the [[extended cross]] (also known as ''X-cross''), or other extensions to the Fridrich Method, such as [[COLL]] for suitable LL cases..

== External links ==
For a more detailed description that closely parallels the one above, refer to one of the following pages written by members of the Speedsolving forum:
* [http://www.cubefreak.net/speedcubing.html Macky's Guide]
* [http://www.speedsolving.com/forum/showthread.php?t=3688 Speedsolving Forum's ''How to Get Faster with the Fridrich Method'' Guide]
* [http://www.speedsolving.com/forum/showthread.php?t=3688 Masterthecube Forum's ''From noober cuber to UBER CUBER'' guide]

Road to Sub-15 Second Averages

2008-08-28T21:01:12Z

Badmephisto: we should not have 3 copies of the same thing. Best is to have one section that summarizes the whole thing, and then have additional links that link to the originial articles.

Here we present some ideas as to how to break 15 seconds consistently with the Fridrich method.

== Using the Fridrich Method ==
Reaching 15-second averages may be obtained via the following tips -- to be performed in chronological order.

# [[Beginner's Methods|Beginner's Method]]
#* First learn how to solve the Rubik's cube using a tutorial, such as one in the [[Beginner's Methods]] section.
#** Tip: Solve with your cross on the bottom! It ''will'' help you out later.
#* Learn how to [[Lubrication|lubricate]] your cube.
#* Use a timer, such as an [[Web-based Software#Web-based Timers|online timer]] or a [[PC Software#Standalone Timers|PC timer]] to see your progression.
# Learn [[2-look OLL]] algorithms.
# Learn [[2-look PLL]] algorithms.
# Learn to do the [[F2L| First Two Layers (F2L)]] efficiently.
#* Use a tutorial, such as [http://ca.youtube.com/watch?v=k-xbcAMfWwM Badmephisto's YouTube Tutorial on F2L].
#* Your times will temporarily get worse, but after a few days of practicing, they will rapidly become better.
#* Practice F2L -- practice a lot. F2L is undeniably the most important part.
# Learn full (1-look) [[PLL]].
#* 21 algorithms to learn.
#* At this point, consider buying a [[Cubes#Cubes|DIY Cube]]. Assuming look-ahead is good, focusing on speed might be important now.
# Learn full (1-look) [[OLL]].
#* 57 algorithms. Don't learn them too quickly, otherwise recognition will be impeded upon. But don't learn them too slowly; try to learn ''consistently''. Steady, slow or fast, will always win the race.
# Look into [[advanced F2L techniques]], such as the [[extended cross]] (also known as ''X-cross''), or other extensions to the Fridrich Method, such as [[COLL]] for suitable LL cases..

== External links ==
For a more detailed description that closely parallels the one above, refer to one of the following pages written by members of the Speedsolving forum:
* [http://www.cubefreak.net/speedcubing.html Macky's Guide]
* [http://www.speedsolving.com/forum/showthread.php?t=3688 Speedsolving Forum's ''How to Get Faster with the Fridrich Method'' Guide]
* [http://www.speedsolving.com/forum/showthread.php?t=3688 Masterthecube Forum's ''From noober cuber to UBER CUBER'' guide]

Commutators and Conjugates

2008-08-26T20:40:14Z

Badmephisto: New page: == Introduction == Commutator is an algorithm of the form A B A' B', where A,B denote an algorithm, and A', B' denote that algorithm's inverse. Commutators are usually used to generate alg...

== Introduction ==
Commutator is an algorithm of the form A B A' B', where A,B denote an algorithm, and A', B' denote that algorithm's inverse. Commutators are usually used to generate algorithms that only modify small portion of a cube, and they are derivable and intuitive.

== Links ==
* [http://www.speedsolving.com/forum/showthread.php?t=169 Post from Speedsolving] on Commutators
* [http://ca.youtube.com/watch?v=7yZoDi_B1lI YouTube tutorial] by badmephisto on Commutators and their uses
* [http://www.ryanheise.com/cube/commutators.html RyanHeise.com] has a page on commutators. Also notice all kinds of other useful sections on his website on the left. He has a lot of group theory related content, and other things that will really help you understand how algorithms work, and how you can create your own.

Competitions General

2008-08-26T20:34:57Z

Badmephisto: New page: == Creating your own == Bob Burton from CubeWhiz created a helpful page on [http://www.cubewhiz.com/competition.html how you can create an official competition.]

== Creating your own ==
Bob Burton from CubeWhiz created a helpful page on [http://www.cubewhiz.com/competition.html how you can create an official competition.]

User:Badmephisto

2008-08-26T17:32:22Z

Badmephisto: New page: I am the mod of this place. rawr

I am the mod of this place. rawr

Talk:Road to Sub-15 Second Averages

2008-08-26T17:32:00Z

Badmephisto:

This page will need substantial editing.
Instead of copy pasting the text from the forum post, perhaps it is better to just link to it. If you make a comment, append four tilda signs after it. Wiki will substitute your name in there, so we know who wrote the comment. [[User:Badmephisto|badmephisto]] 17:32, 26 August 2008 (UTC)

Lubrication

2008-08-24T17:05:17Z

Badmephisto: /* Jig-A-Loo */

== Description ==
This page contains descriptions of different lubricants and suggestions for use. Suggested usage of lube includes disassembling a cube to insert the lube, applying, and turning the cube to work it in. It is also recommended that you do not apply lube to stiffer cubes, as this can sometimes make them even harder to turn.

== Silicon-Based ==
Silicon-based lubricants are a highly popular and effective way to lubricate cubes.

===Jig-A-Loo===
Used by many cubers, this lubricant works very well. However, it can melt plastic temporarily, so it is recommended that you completely disassemble your cube to lubricate it, and that you let the pieces dry well before reassembly. Jig-a-loo in fact melts the plastic temporarily, but after drying it out everything gets back to normal.
* Take a look at [http://www.speedsolving.com/forum/showthread.php?t=5129&highlight=jigaloo&page=2 THIS] thread for detailed discussion on Jig-a-loo

===Rubik's Lube===
This is the lube that comes in a syringe-like container when you order from Rubiks.com.
* [http://www.rubiks.com/Shop/Products/Rubiks%20Cube%20Lube%20Kit%203x3.aspx Rubik's Cube Lube]

===CRC Silicon Spray===
CRC silicon spray has been used by many cubers. This is a very good lubricant to use. It will dry out soon, but works well.

== Petroleum-Based ==
These include lubricants such as vaseline or WD-40. It is '''Strongly suggested you use these with caution''', as petroleum and petroleum distillates speed the aging of plastic, and may dissolve the plastic.

===Vaseline===
Goopy and well known, this is not the best lube. It may eat at the plastic and gum up, making the cube harder to turn.

===WD-40===
Known for damaging cubes and making them harder to turn, this does not act as a lubricant for the plastic at all. It is recommended you '''do not use this'''.

== Other ==
Other types of lubricants

=== Cooking No-stick Spray ===
Yes, PAM. Not necessarily the cleanest or best thing to use, it works nonetheless. It does not eat at the plastic and can be just as effective as shock oil on a loose cube. It is recommended you clean out your cube frequently if you use this.

Lubrication

2008-08-24T17:05:00Z

Badmephisto: /* Jig-A-Loo */

== Description ==
This page contains descriptions of different lubricants and suggestions for use. Suggested usage of lube includes disassembling a cube to insert the lube, applying, and turning the cube to work it in. It is also recommended that you do not apply lube to stiffer cubes, as this can sometimes make them even harder to turn.

== Silicon-Based ==
Silicon-based lubricants are a highly popular and effective way to lubricate cubes.

===Jig-A-Loo===
Used by many cubers, this lubricant works very well. However, it can melt plastic temporarily, so it is recommended that you completely disassemble your cube to lubricate it, and that you let the pieces dry well before reassembly. Jig-a-loo in fact melts the plastic temporarily, but after drying it out everything gets back to normal.
Take a look at [http://www.speedsolving.com/forum/showthread.php?t=5129&highlight=jigaloo&page=2 THIS] thread for detailed discussion on Jig-a-loo

===Rubik's Lube===
This is the lube that comes in a syringe-like container when you order from Rubiks.com.
* [http://www.rubiks.com/Shop/Products/Rubiks%20Cube%20Lube%20Kit%203x3.aspx Rubik's Cube Lube]

===CRC Silicon Spray===
CRC silicon spray has been used by many cubers. This is a very good lubricant to use. It will dry out soon, but works well.

== Petroleum-Based ==
These include lubricants such as vaseline or WD-40. It is '''Strongly suggested you use these with caution''', as petroleum and petroleum distillates speed the aging of plastic, and may dissolve the plastic.

===Vaseline===
Goopy and well known, this is not the best lube. It may eat at the plastic and gum up, making the cube harder to turn.

===WD-40===
Known for damaging cubes and making them harder to turn, this does not act as a lubricant for the plastic at all. It is recommended you '''do not use this'''.

== Other ==
Other types of lubricants

=== Cooking No-stick Spray ===
Yes, PAM. Not necessarily the cleanest or best thing to use, it works nonetheless. It does not eat at the plastic and can be just as effective as shock oil on a loose cube. It is recommended you clean out your cube frequently if you use this.

Rubik's Cube Fact sheet

2008-08-24T00:19:13Z

Badmephisto: /* 3x3x3 Rubik's Cube facts */

== 3x3x3 Rubik's Cube facts ==
Here are some 3x3x3 Rubik's cube facts:
* It was first released in 1977.
* There are 4.3*10^19 possible configurations. That's 43,252,003,274,489,856,000 ways a cube can be scrambled. To give you an idea of how big that number is, if there were one cube scrambled for every legal position, they would cover the surface of the earth about 150 times!
* Number of moves to solve
** All positions can be solved using 22 or less moves. Extensive computer analysis is being done to prove this upper bound to be lower, but we know that the lowest it can get is 20 moves, because there are known positions (such as the [[superflip]]) that are known to require 20 moves to solve optimally.

== 2x2x2 Cube facts ==
Here are some 2x2x2 Cube facts:
* There are 3,674,160 positions

Superflip

2008-06-20T19:39:42Z

Badmephisto:

[[Image:superflip.gif|frame|Superflip]]

'''Superflip''' is a position of the Rubik's cube where all edges are flipped in place.
It is known to require 20 moves to be optimally solved and its symmetry is the reason that some believe it to be the "hardest" scramble of a Rubik's cube.

Scramble: U R2 F B R B2 R U2 L B2 R U' D' R2 F R' L B2 U2 F2

List of PC cubing software

2008-06-18T20:29:35Z

Badmephisto:

== Description ==
A very popular category of Rubik's cube software is the playable 3D Rubik's Cube (animated cube), often implemented as a Java applet, which has a long history. The first version of which many current programs are derived was made by Michael Shubart. After that, Karl Hornell made modifications in his version, which again was used by Lars Petrus on his website. Probably the most widely used is RubikPlayer by Werner Randelshofer.

== Standalone Timers ==
* [http://vanderblonk.com/cube/download/rtt/About.htm RubikTimer] - (Windows)
* [http://www.strangepuzzle.com/jnetcube.html JNetCube] - (Java)
* [http://code.google.com/p/rubiks-jtimer/ JTimer] - New version of JNetCube (Java)
* [http://vanderblonk.com/cube/cubetimer.htm CubeTimer] - Timer with animation
* [http://gnehzr.net/cct/ CALCubeTimer 0.2] - Interfaces with a stackmat through the microphone port
* [http://soft.imolecule.net/?lang=en iMolecule Soft DarkCube] - Timer in Thai English under CC By-NC-SA 3.0 license

== Solvers ==
* [http://software.rubikscube.info/JACube/index.html ACube] - (Java, freeware, command-line based)
* [http://kociemba.org/cube.htm Cube Explorer] - (Windows, freeware, comes with graphical interface)
* [http://www.geocities.com/jaapsch/puzzles/cubie.htm Cubie] - Solver with animation (Java, freeware)
* [http://www.wrongway.org/?rubik Rubik's Cube Solver by Eric Dietz] - (Windows/Linux, GPL)
* [http://www.ganpuzzle.com/vcube333demo.htm Learn to Solve Rubik's Cube with 3 Simple Tricks] - Step-by-step interactive animated solution (Java)
* [http://www.ganpuzzle.com/hints3x3.htm Rubik's Solution Hints Booklet Step Animation] - Step-by-step interactive animated solution based on official booklet (Java)

== Animations ==
* [http://www.ultimatemagiccube.com Ultimate Magic Cube] - (Windows). Megaminx, pyraminx and much more
* [http://www.glidingcube.com GlidingCube] - (Windows) A virtual cube puzzle. Intriguing but cannot be built physically.
* [http://www.superliminal.com/cube/cube.htm 4D Cube] - (Java)
* [http://www.gravitation3d.com/magiccube5d/ 5D Cube] - (Windows)
* [http://sourceforge.net/projects/rubiksim/ RubikSim] - (Windows)
* [http://www.network54.com/Forum/178387/message/1191974095/ QBASIC Rubik's Cube] - (DOS/Windows) At 26,375 bytes (25.7 KB), the smallest Rubik's cube on PC