# Difference between revisions of "CFOP method"

 CFOP method Information about the method Proposer(s): David SingmasterRené SchoofJessica FridrichHans DockhornAnneke Treep Proposed: 1981 Alt Names: Fridrich Method Variants: CLL/ELL, VH, ZB, MGLS-F No. Steps: 4 (Cross, F2L, OLL, PLL) No. Algs: Total: 78 to 119F2L: 0 to 41Full 2LLL: 78 (OLL: 57, PLL: 21) Avg Moves: ~55 Purpose(s):
 Scrambled cube -> Cross -> F2L -> OLL -> PLL -> Solved cube CFOP is the most frequently used speedsolving method for the 3x3x3 cube.

CFOP (Cross, F2L, OLL, PLL, pronounced C-F-O-P or C-fop) is a 3x3 speedsolving method proposed by several cubers around 1981. It is also known as the Fridrich Method after its popularizer, Jessica Fridrich. In part due to Fridrich's publication of the method on her website in 1995, CFOP has been the most dominant 3x3 speedcubing method since around 2000, with it and its variants used by the vast majority of the top speedcubers such as Feliks Zemdegs, Max Park, Sebastian Weyer, Mats Valk, etc.

## Origin and Naming Dispute

Jessica Fridrich is often erroneously credited as the sole inventor of CFOP. In reality, many developments were made in the early '80s by other cubers who have contributed to the method in its current form. The constituent techniques and their original proposers are as follows:

During the resurgence in speedcubing's popularity in the late '90s and early 2000s, there was a general lack of information on the sport. Fridrich's website offered a vast wealth of information for those entering the sport, including a full description of CFOP with complete lists of algorithms. As a result, many who learned from her website began to call this method the "Fridrich Method," which explains the common use of the term today.

Several high-profile cubers have long disputed this terminology; Ron van Bruchem, famously, has publicly written that he will never call CFOP the "Fridrich Method." This issue has become well-advertised within the cubing community around the year 2008, likely because of this. The term "CFOP" has since seen increasing usage compared to back then, also in part motivated by efforts to standardize terminology in method classification, and is now seen, commonly, as "Fridrich Method."

While some cubers still insist on the term "CFOP," Fridrich's contribution to the popularization of the method is undeniable, and many others accept the term "Fridrich Method" as established terminology and a perfectly valid synonym for "CFOP."

## Steps

CFOP can be viewed as an advanced version of a Layer-By-Layer method. In particular, it combines some steps of the said method into one by using many more algorithms. Here, we outline pure CFOP without any additional trick. Also, the cube is commonly solved with the white side on top for the cross, yellow on the bottom for the cross, and opposite for the other steps. However, it is NOT required.

 Cross Make a cross on one side by solving all edges of a given face. A Make sure to align the edges with the second-layer centers. It is recommended that you solve the cross on the bottom face and that you become familiar doing the cross with all colors; not just one.
 F2L (First Two Layers) Fill in the four slots between the cross pieces, one slot at a time. Each slot is filled by inserting a corner and its corresponding edge simultaneously. Most of the 41 cases have reasonable intuitive solutions. The completion of this step leaves one with just the last layer, typically placed on top.
 OLL (Orientation of the Last Layer) Make the entire top side (the last layer) of the cube a solid color. 57 nontrivial cases. Those new to OLL break up the step into two. This greatly reduces the number of cases; 2-look OLL has 9 cases. However, note that this is a few seconds slower
 PLL (Permutation of the Last Layer) Finally, you finish the cube by permuting the top layer of the cube. 21 nontrivial cases. Those new to PLL break up the step into two. This greatly reduces the number of cases; 2-look PLL has 6 cases. However, note that this is a few seconds slower

## Pros

• Easy to learn - CFOP is widely considered to be the easiest method to learn, as it transitions easily from beginner's methods.
• Doesn't require a large understanding of how the cube works - Due to the lack of blockbuilding or edge orientation needed in CFOP, the method relies more on pattern recognition and algorithms. Although the cross and F2L are solved intuitively, they are more straightforward than the blockbuilding with Roux or the edge orientation and blockbuilding with ZZ.
• Is by far the most researched method - As CFOP is the most widely used method and has been for many years, there has been far more research done on CFOP than any other method, which means more resources, a larger variety of algorithms to choose from, and more community members to assist and give advice. All world records for the 3x3 Rubik's Cube since 2003 have been set with CFOP.
• Statistically the fastest speedsolving method - Statistically speaking, CFOP has proven to currently be the fastest method, despite the move count. As of June 1, 2016, the top four speedsolvers in 3x3 average use the method, as well as the top fifteen speedsolvers in 3x3 single.

## Cons

• Algorithms - CFOP with 4 Look last layer makes a total of 16 algorithms (10 2-look OLL algs and 6 2-look PLL algs). Full CFOP has 57 OLLs and 21 PLLs for a total of 78 algorithms. If a person learned one full CFOP alg a day (OLL and PLL), it would take a bit over 2 and a half months to learn all of them.
• Move count - CFOP has a slightly higher average movecount than that of ZZ and much higher movecount compared to Roux.
• Reliance on Inspection - CFOP relies on the use of inspection time, in order for the cross (and the first pair, depending on how advanced the user is) to be solved quickly. In instances where there is no inspection time, such as big cube solves where one must transition between the cube's reduction and 3x3x3 steps, this can be a drawback as the cross has to be done on the fly rather than being planned out. Although this may be the case, CFOP is still the most popular choice for the 3x3x3 stage on big cubes as the planning and execution of a Roux or ZZ solve is typically more difficult than doing CFOP.
• Difficulty of Cross - Planning the cross during inspection can take a while to master. It requires a fair amount of experience, similar to planning the first block with Roux or the EOLine with ZZ.