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 === Fridrich F2L ===   === Fridrich F2L === 
   
−  There are many ways to solve the 'F2L' on a cube. A common system is using the [[Fridrich]] method first two layer approach. After solving the cross, a corneredge pair is paired up ('''form pair'''), and then inserted into the correct slot ('''pair insertion'''). A total of four corner edge (or 'CE') pairs are made and inserted to solve the first two layers. This step of the cube should be done intuitively, even though there are algorithms for each case, algorithms can be used for slower cases.  +  There are many ways to solve the 'F2L' on a cube. A common system is using the [[Fridrich]] method first two layer approach. After solving the cross, a corneredge pair is paired up ('''form pair'''), and then inserted into the correct slot ('''pair insertion'''). A total of four corner edge (or 'CE') pairs are made and inserted to solve the first two layers. This step of the cube should be done intuitively, even though there are algorithms for each case, algorithms should only be used for slower cases. 
   
 The concept of pairing up four corner/edge pairs was first proposed by [[René Schoof]] in 1981.   The concept of pairing up four corner/edge pairs was first proposed by [[René Schoof]] in 1981. 
Revision as of 12:50, 26 April 2018
First Two Layers, or F2L are normally the first two bottom layers of the 3x3x3 cube, or essentially all layers up until the last layer on larger cubes.
The definition is a little different depending on the subject or who you are talking to. Usually, it refers to the part of the CFOP and CFCE methods that solve the first two layers in pairs, excluding the cross step.
2gen F2L, most pairs (30 of 41) have the edge sitting in the Ulayer having two orientations, it shows R or F colour at the side. If it is the R colour you can solve the pair using only RU and if it is the F colour you can turn the cube (y') and sovle the pair to the back slot using only RU. The only pairs that needs both R and F turns are the six ones with the edge unoriented in the slot, if the edge is oriented in the slot both ways works.
Approaches
Petrus F2L
Another way to solve the 'F2L' is by building blocks, common during the first two layers of the Petrus method.
Fridrich F2L
There are many ways to solve the 'F2L' on a cube. A common system is using the Fridrich method first two layer approach. After solving the cross, a corneredge pair is paired up (form pair), and then inserted into the correct slot (pair insertion). A total of four corner edge (or 'CE') pairs are made and inserted to solve the first two layers. This step of the cube should be done intuitively, even though there are algorithms for each case, algorithms should only be used for slower cases.
The concept of pairing up four corner/edge pairs was first proposed by René Schoof in 1981.
Easy Cases
Reposition Edge
Reposition Edge and Flip Corner
F2L 9

F2L 10
Back Right Slot Open: R' U R2 U R'

F2L 11

F2L 12
Back right slot open: R' U2 R2 U R'

F2L 13
Back right slot open : R' U R F' U' F

F2L 14

Split Pair by Going Over
F2L 15
Front left slot open: U (R U' R') D (R U' R') D'
Back right slot open: U' (R' U R U') (R U R')
F2L 16

F2L 17

F2L 18

Pair Made on Side
F2L 19

F2L 20

F2L 21

F2L 22

Weird
F2L 23

F2L 24

Corner in Place, Edge in U Face
F2L 25
If the back right slot is open:

F2L 26

F2L 27

F2L 28

F2L 29

F2L 30

Edge in Place, Corner in U face
F2L 31

F2L 32

F2L 33

F2L 34
Back right slot open:

F2L 35

F2L 36

Edge and Corner in Place
F2L 37
Solved

F2L 38
Back right corner free D' R U R' F R' F' R

F2L 39
F2L 40

F2L 41

F2L 42

See also
External Resources
Beginner
Standard
Advanced
F2L Trainers
ExpertCuber.by