Difference between revisions of "Fridrich Method"

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{{Method Infobox
+
#REDIRECT [[CFOP]]
|name=Fridrich
 
|image=Fridrich_method.gif
 
|proposers=[[David Singmaster]]<br/>[[Ren Schoof]]<br/>[[Jessica Fridrich]]<br/>[[Hans Dockhorn]]<br/>[[Anneke Treep]]
 
|year=1981
 
|anames=CFOP
 
|variants=[[CLL]]/[[ELL]], [[VH]], [[ZB]],  [[MGLS-F]]
 
|steps=4
 
|algs=78 to 119 <br/>F2L:0 to 41<br/>LL: 78
 
|moves=56
 
|purpose=<sup></sup>
 
* [[Speedsolving]]
 
* [[Speed BLD]]
 
* [[One-Handed Solving]]
 
* [[Solving with Feet]]
 
}}
 
 
 
The '''Fridrich Method''', also '''CFOP'''; ''Cross, F2L, OLL and PLL'', was popularized by [[Jessica Fridrich]]. It 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 fact that the name Fridrich method is used for this method can be discussed. Fridrich was the first to publish and popularize the method although several other people also invented this method at the same time. A 'better' but less used name for this method  would simply be the CFOP 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. This method has been used to set many world records.  It takes less thinking than block-building methods because it's more algorithm based.
 
 
 
== 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.
 
 
 
== Origin of the Method ==
 
 
 
[[Jessica Fridrich]] is often erroneously attributed with having 'invented' the Fridrich (or CFOP) method. However, in reality a number of developments made in the early 80's by other cubers contributed to the method as it is today. The constituent techniques and their original proposers are as follows:
 
* The [[Cross]]: David Singmaster
 
* [[F2L]] (4x corner + edge pairs): [[Ren Schoof]] and possibly others.
 
* [[OLL]]/[[PLL]]: [[Hans Dockhorn]], [[Anneke Treep]], with many algorithms developed by [[Jessica Fridrich]]
 
 
 
During the resurgence in popularity of speedcubing in 2003 there was a general lack of information for learning how to speedsolve the cube. Jessica's speedcubing web page offered a vast wealth of information for people entering the sport, including a full description of the CFOP method along with lists of algorithms which could be used. As a result, many who learned from the page began to call their method "Fridrich's method", which explains its predominant use today.
 
 
 
== See Also ==
 
* [[Cross]]
 
* [[XCross]]
 
* [[F2L]]
 
* [[OLL]]/[[PLL]]
 
 
 
{{F2L}}
 
 
 
 
 
{{OLL}}
 
 
 
 
 
{{PLL}}
 
 
 
== External Links ==
 
 
 
* [http://solvethecube.110mb.com/ Joël van Noort's tutorial]
 
* [http://erikku.er.funpic.org/rubik/Fridrich.html Erik Akkersdijk's tutorial]
 
* [http://www.cubefreak.net/Fridrich/main.html Shotaro Makisumi's tutorial]
 
* [http://www.ws.binghamton.edu/fridrich/cube.html Jessica's Homepage]
 
* [http://www.youtube.com/watch?v=k-xbcAMfWwM Badmephisto's Intuitive F2L Tutorial]
 
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=2322 Fridrich Method] - info on its origin.
 
 
 
 
 
[[Category:Methods]]
 
[[Category:3x3x3 Methods]]
 
[[Category:3x3x3 Speedsolving Methods]]
 
[[Category:SpeedBLD Methods]]
 

Revision as of 20:59, 19 May 2012

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