F2L
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Information
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Proposer(s):
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John Conway, David Benson, and David Seal
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Proposed:
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1979
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Alt Names:
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First Two Layers
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Variants:
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ZZ F2L, ZBLS, VHF2L, WV, MGLS, possibly others
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Subgroup:
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<U,R,L,F,B,D>
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No. Algs:
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0 to 41; hundreds more with Advanced F2L
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Avg Moves:
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6.7 HTM per slot; ~26.8 HTM per four slots
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Purpose(s):
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First Two Layers, or F2L refers to 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. Or it can refer to ZZ's F2L.
2-gen F2L, most pairs (30 of 41) have the edge sitting in the U-layer 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 solve the pair to the back slot using only R and U moves. 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 corner-edge 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 in 1979 by John Conway, David Benson, and David Seal in two separate publications.[1] The idea appeared in other publications starting in 1981.
ZZ F2L
ZZ F2L is very similar to CFOP F2L, but there are some differences in ways you can pair up pieces. ZZ is more blockbuilding centered, and in result, F2L can be completed using block building.
See also
Basic Inserts
Reposition Edge
F2L 5
If the front left slot is open:
If the back right slot is open:
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F2L 6
If the front left slot is open:
If the back right slot is open:
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F2L 7
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F2L 8
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Reposition Edge and Flip Corner
F2L 9
If the back right slot is open:
If the front left slot is open:
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F2L 10
If the front left slot is open:
If the back right slot is open:
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F2L 11
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F2L 12
If the back right slot is open:
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F2L 13
If the back right slot is open:
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F2L 14
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Split Pair by Going Over
F2L 15
If the back right slot is open:
If the front left slot is open:
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F2L 16
If the back right slot is open:
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F2L 17
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F2L 18
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Pair Made on Side
F2L 19
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F2L 20
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F2L 21
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F2L 22
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Weird
F2L 23
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F2L 24
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Corner in Place, Edge in U Face
F2L 25
If the back right slot is open:
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F2L 26
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F2L 27
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F2L 28
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F2L 29
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F2L 30
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Edge in Place, Corner in U face
F2L 31
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F2L 32
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F2L 33
If the back right slot is open:
If the front left slot is open:
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F2L 34
If the back right slot is open:
If the front left slot is open:
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F2L 35
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F2L 36
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Edge and Corner in Place
F2L 37
Solved
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F2L 38
If the back right slot is open:
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F2L 39
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F2L 40
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F2L 41
If the back right slot is open:
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F2L 42
If the front left slot is open:
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See also
External Resources
Beginner
Standard
Advanced
F2L Trainers
SpeedCubeDB trainer - for all sets and orientations
ExpertCuber.by