# What are 2-gen algorithms?

#### rubiknewbie

##### Member
I heard people talk about this. Is it algorithms that only deal with 2 faces? Got some examples?

#### Shortey

Example:
Sune - R U R' U R U2 R'

=)

#### AndyRoo789

Algorithms that only use 2 sides of the cube. (Usually R and U)

#### Weston

Other times its MU

its never really anything else unless youre left handed.

#### AvGalen

2 Gen means "consisting of 2 generators". Those 2 generators could be something as basic as [R] or something really complicated.
So any algorithm that consists of only R R2 R' U U2 U' is considered 2 gen.
So are algorithms that consists of only M M2 M' U U2 U' (slice-algs).
And so are algorithms that consist of only L L2 L' U U2 U' (mirrored or lefthanded algs)

BUT because the generators could be chosen as
f and b (double layers) that means that fbfbffb is 2 gen as well

And technically you could argue that (U L' F r') (B d') (U L' F r') (B d') is 2 gen as well, but nobody really means that when they say 2-gen

(if you choose the two generators as [ULFRBD] and [ulfrbdxyzMES] basically everything becomes 2 gen but again that is not what people mean when the say 2-gen)

#### Thomas09

##### Member
2 gen = solving 2 pairs at once

jks, but seriously, if you want to improve your tps, go to www.mzrg.com/qqtimer. It has 2gen (RU) scrambles, which are fun to solve, and you can get awesome tps
Yes, I love 2 gen solves. So fluid and great for starting out on OH.

#### Akuma

##### Member
"2 gen" algorithm is an algorithm consisting of only 2 kinds of moves in a repeated patterns. Usually R and U movements.

The reason why attention are given to these is because R and U algorithms can be preformed very fast and very fluid thus these algorithms are usually desired amongst speedcubers. A lot of algorithms can be re-designed to only be using R and U moves but the drawback is that the algorithm sometimes becomes longer or harder to remember due to the monotony of the algorithm.

#### Sharkretriver

##### Member
What method uses a lot of R U 2-gen?

#### Edward

##### Member
What method uses a lot of R U 2-gen?

After the 2x2x3 in petrus (is that right?) and EO, the entire rest of F2L can be solved 2gen. Also, when using ZZ, after EO, the F2L can be solved using RU and LU moves...

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#### cincyaviation

##### Member
What method uses a lot of R U 2-gen?

such an un-needed bump, there is the 1AQT for a reason, but to answer your question, roux and petrus both build blocks and then orient edges, enabling the rest of the cube (only the rest of F2L for petrus i think) to be solved in 2 gen (M,U for roux and R,U for petrus) and ZZ orients all edges to begin with, so that the whole F2L can be done in 3 gen with no cube rotations

#### Edward

##### Member
What method uses a lot of R U 2-gen?

such an un-needed bump, there is the 1AQT for a reason, but to answer your question, roux and petrus both build blocks and then orient edges, enabling the rest of the cube (only the rest of F2L for petrus i think) to be solved in 2 gen (M,U for roux and R,U for petrus) and ZZ orients all edges to begin with, so that the whole F2L can be done in 3 gen with no cube rotations

It was a perfectly relevant bump, and you have been ninja'd.

#### cincyaviation

##### Member
What method uses a lot of R U 2-gen?

such an un-needed bump, there is the 1AQT for a reason, but to answer your question, roux and petrus both build blocks and then orient edges, enabling the rest of the cube (only the rest of F2L for petrus i think) to be solved in 2 gen (M,U for roux and R,U for petrus) and ZZ orients all edges to begin with, so that the whole F2L can be done in 3 gen with no cube rotations

It was a perfectly relevant bump, and you have been ninja'd.
i didn't think it was that relevant, and i saw your post before i made mine >_>
Whats that smiley even mean BTW?

#### miniGOINGS

##### Member
such an un-needed bump, there is the 1AQT for a reason, but to answer your question, roux and petrus both build blocks and then orient edges, enabling the rest of the cube (only the rest of F2L for petrus i think) to be solved in 2 gen (M,U for roux and R,U for petrus) and ZZ orients all edges to begin with, so that the whole F2L can be done in 3 gen with no cube rotations

Kind of...

Petrus usually goes ...EO --> <R, U> --> LL
Whereas Roux usually goes ...CMLL --> <M, U>

Roux EO is part of the <M, U> phase.

#### CubesOfTheWorld

##### Member
Only deal with 2 faces.
H-Perm: R2 U2 R U2 R2 U2 R2 U2 R U2 R2

#### Sharkretriver

##### Member
What method uses a lot of R U 2-gen?

Why did you bump this thread? Why?

I'm new to the forums! I don't know what everybody means by that! don't make me feel worse!

#### Sharkretriver

##### Member
What method uses a lot of R U 2-gen?

such an un-needed bump, there is the 1AQT for a reason, but to answer your question, roux and petrus both build blocks and then orient edges, enabling the rest of the cube (only the rest of F2L for petrus i think) to be solved in 2 gen (M,U for roux and R,U for petrus) and ZZ orients all edges to begin with, so that the whole F2L can be done in 3 gen with no cube rotations
wtf is the 1AQT just wondering.

#### riffz

##### Member
What method uses a lot of R U 2-gen?

such an un-needed bump, there is the 1AQT for a reason, but to answer your question, roux and petrus both build blocks and then orient edges, enabling the rest of the cube (only the rest of F2L for petrus i think) to be solved in 2 gen (M,U for roux and R,U for petrus) and ZZ orients all edges to begin with, so that the whole F2L can be done in 3 gen with no cube rotations
wtf is the 1AQT just wondering.

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