The "Request an Alg" Thread

[Aiminer357]

Does anybody know any website which has COALL algs? I just want to look at them.

 

[JayT]

F2L case 19/20 rotationless insertions

Recently I've been working on F2L cases 19, 20, 21 and 22. When I first learned these cases, I just used the default strategy of matching the edge piece with its center cap and inserting. If a rotation was required, I would do so. I've decided to learn how to insert all 16 of these cases without rotating (half of them are obvious, because they can be matched up without rotating, obviously). So I can do case 21 and 22 from every angle now without rotating. 19 and 20 are a little harder. I can insert case 20 into every slot other than BL. As for case 19, I need an algorithm for both BR and FL. I might end up just mirroring the case 20 FR insertion for case 19 FR.


Case 20 (into BL):

Case 19 (into FL):

Case 19 (into BR):

So I'm hoping you guys know some good rotation-less algs to insert these cases from this specific angle. Also interested to know how many of you bother to do it rotation-less, and instead just rotate for some for some of them.

The algs I am already using for 19/20/21/22

19 (FL): ???
19 (BR): ???

20 (FR): R U' R2' F R F' R U' R'
20 (BL): ???

21 (FL): F R U2 R' F'
21 (BR): r' U r U2 r' U' r

22 (FR): r U' r' U2 r U r'
22 (BL): l U' l' U2 l U l'

 

[FJT97]

Hi

Is there a 2-dedge-pairing-algo for 4x4 that doesn't destroy the f2l, or in general, that destroys the least possible?

 

[TDM]

Hi

Is there a 2-dedge-pairing-algo for 4x4 that doesn't destroy the f2l, or in general, that destroys the least possible?

[u': R U R' F R' F' R] (WCA notation) only affects FL and FR, so if your eges are on U then setup with an x'.

 

[FJT97]

[u': R U R' F R' F' R] (WCA notation) only affects FL and FR, so if your eges are on U then setup with an x'.

but that destroys the f2l. Is there an alg which does not destroy the f2l?

 

[FJT97]

Recently I've been working on F2L cases 19, 20, 21 and 22. When I first learned these cases, I just used the default strategy of matching the edge piece with its center cap and inserting. If a rotation was required, I would do so. I've decided to learn how to insert all 16 of these cases without rotating (half of them are obvious, because they can be matched up without rotating, obviously). So I can do case 21 and 22 from every angle now without rotating. 19 and 20 are a little harder. I can insert case 20 into every slot other than BL. As for case 19, I need an algorithm for both BR and FL. I might end up just mirroring the case 20 FR insertion for case 19 FR.


Case 20 (into BL):

http://i.imgur.com/3Iaip4b.png

Case 19 (into FL):

http://i.imgur.com/pilBbWQ.png

Case 19 (into BR):

http://i.imgur.com/SYTYbTM.png

So I'm hoping you guys know some good rotation-less algs to insert these cases from this specific angle. Also interested to know how many of you bother to do it rotation-less, and instead just rotate for some for some of them.

The algs I am already using for 19/20/21/22

19 (FL): ???
19 (BR): ???

20 (FR): R U' R2' F R F' R U' R'
20 (BL): ???

21 (FL): F R U2 R' F'
21 (BR): r' U r U2 r' U' r

22 (FR): r U' r' U2 r U r'
22 (BL): l U' l' U2 l U l'

Why not just rotate? In general, why are you learning all those algs? I assume that you are quite a new cuber. Why not just doing those case intuitively? It won't be noticeably slower and you improve your understanding of the cube.

 

[JayT]

Why not just rotate? In general, why are you learning all those algs? I assume that you are quite a new cuber. Why not just doing those case intuitively? It won't be noticeably slower and you improve your understanding of the cube.

I know how to do every case intuitively. I want to know how to do it rotation-less too.

 

[TDM]

but that destroys the f2l. Is there an alg which does not destroy the f2l?

Sorry, I meant [u', R U R' F R' F' R].

 

[CornerCutter]

Hi,

I need a alg for a 4x4 parity error.

Here it is:



All the edges are paired up except the ones on the upper F and upper B.

Thanks.

 

[mafergut]

How about U x' and the normal alg you would do if they where in the front F2L slots?

 

[h2f]

Hi,

I need a alg for a 4x4 parity error.

Here it is:

View attachment 6088

All the edges are paired up except the ones on the upper F and upper B.

Thanks.

Rw' F R' F' R U' R U R r

 

[CornerCutter]

Thanks so much for that alg.

 

[mjm]

[CFOP]
I'm looking for an alg for an F2L situation where the slots in FR and BL are open, and there's one pair that can be inserted with R U R' and the other can be put in with L U L'. Something that would either leave one pair with a three-move insert, or something that inserts both pairs.

 

[Cale S]

[CFOP]
I'm looking for an alg for an F2L situation where the slots in FR and BL are open, and there's one pair that can be inserted with R U R' and the other can be put in with L U L'. Something that would either leave one pair with a three-move insert, or something that inserts both pairs.

Does L R U R' L' work?

 

[mjm]

Does L R U R' L' work?

Sure does, that's wonderful. Thanks a lot!

 

[mjm]

Another super similar F2L question...
Open slots in FR and BR, pairs that can be inserted with (R U R') and (R' U' R).

 

[Voso01]

Hi! I am looking for an algorithm that would put all edges from the M-slice on the S-slice and all the edges from the S-slice on the M-slice. They can be permuted within the slices.

 

[sqAree]

Hi! I am looking for an algorithm that would put all edges from the M-slice on the S-slice and all the edges from the S-slice on the M-slice. They can be permuted within the slices.

U R2 F2 B2 R2 F2 B2 D' R2 L2

 

[gyroninja]

Hi! I am looking for an algorithm that would put all edges from the M-slice on the S-slice and all the edges from the S-slice on the M-slice. They can be permuted within the slices.

Like this?

U' M2 S2 U

 

[Voso01]

Like this?

U' M2 S2 U

Wow, it's so stupidly simple