The "Request an Alg" Thread

[TDM]

I think I've seen a good alg for COLL case 24 (Pi with same colors on headlights) before but can't seem to find it on the wiki nor on boca. Does anyone know?

Looked here?

 

[Nilsibert]

Looked here?

Haven't thought of this site, never used it before. Big thanks!

 

[FJT97]

shortest algo for the triple sexy move f2lcase?

 

[TDM]

shortest algo for the triple sexy move f2lcase?

[U2] R2 U2 R2 U' R2 U' R2
R2 U R2 U R2 U2 R2
Not sure if these are the shortest, but they're fairly short and 2-gen. They're sune/antisune with R2 instead of R/R'.

 

[thatboyahcubah]

Algs for all G perms from all sides?

 

[SpeedCubeReview]

I'm looking to make a checkered patter with my 2x2 and 4x4. Not the one where you just flip the sides, but where three sides flip (eg. blue, red and white are checkered, and then green, orange and yellow are checkered).... NOW I understand that it is not actually possible because it is an even numbered cube, but I saw where only the blue, red and white side was checkered and not the other three sides. That is what I would like to figure out how to do.

like this

 

[TDM]

I'm looking to make a checkered patter with my 2x2 and 4x4. Not the one where you just flip the sides, but where three sides flip (eg. blue, red and white are checkered, and then green, orange and yellow are checkered).... NOW I understand that it is not actually possible because it is an even numbered cube, but I saw where only the blue, red and white side was checkered and not the other three sides. That is what I would like to figure out how to do.

like this
View attachment 4248

1- swap two adjacent pieces with T perm/J perm/R' F R F' R U2 R' U R U2 R'
2- y U R U' R' U'

 

[Renslay]

I'm looking to make a checkered patter with my 2x2 and 4x4. Not the one where you just flip the sides, but where three sides flip (eg. blue, red and white are checkered, and then green, orange and yellow are checkered).... NOW I understand that it is not actually possible because it is an even numbered cube, but I saw where only the blue, red and white side was checkered and not the other three sides. That is what I would like to figure out how to do.

like this
View attachment 4248

For 2x2:
U2 F' U' F2 R U F U' R U' (10f*)

Edit: ninja'd. TDM's solution may be longer, but easier to memorize.

 

[Michael Womack]

I need a Ub perm alg for the 3x3x2.

 

[SpeedCubeReview]

For 2x2:
U2 F' U' F2 R U F U' R U' (10f*)

Edit: ninja'd. TDM's solution may be longer, but easier to memorize.

Thank you. Is TDM's the 4x4? That still confuses me.

 

[scottishcuber]

Thank you. Is TDM's the 4x4? That still confuses me.

R' F R F' R U2 R' U R U2 R'
y U R U' R' U'

Perform this on a 2x2.

 

[TDM]

I need a Ub perm alg for the 3x3x2.

Can you not just invert your Ua perm?

Thank you. Is TDM's the 4x4? That still confuses me.

2x2: alg.cubing.net
However, if you use all double layer turns, the pattern can also be done on a 4x4: alg.cubing.net

 

[SpeedCubeReview]

Can you not just invert your Ua perm?

2x2: alg.cubing.net
However, if you use all double layer turns, the pattern can also be done on a 4x4: alg.cubing.net

Thank you. That is a great site. Is it possible to have the 4x4 checkered, and not just a large 2x2?

 

[Michael Womack]

Can you not just invert your Ua perm?

I could but I use this U-perm alg F2 U L R' F2 L' R U F2

 

[Bindedsa]

Does anyone have a good alg for this case and the mirror.

 

[TheNextFeliks]

Does anyone have a good alg for this case and the mirror.

F U' R' U R U F' R U R2 U R2 U2 R' and the inverse. From Ben's tripod algs.

 

[Bindedsa]

F U' R' U R U F' R U R2 U R2 U2 R' and the inverse. From Ben's tripod algs.

Thanks, I should probably look through those.

 

[elrog]

Is there an alg set that solves the 3 remaining edges if you already have a tripod (F2L-1, and 2x2x1 on U layer)? If not, does anyone want to find out how many cases there would be? Also, this would disregard the 4 remaining corners.

If you don't include equivalent positions after a rotation around the UFR corner, but you do include inverses and the solved case, there are 24 cases. I will work on generating good algs and post them here.

 

[goodatthis]

If you don't include equivalent positions after a rotation around the UFR corner, but you do include inverses and the solved case, there are 24 cases. I will work on generating good algs and post them here.

Okay, thank you! I would prefer if they could be optimal (or close enough), since I'm thinking about using something like this for FMC. Thanks!

 

[elrog]

Spoiler: Optimal Tripod Edge Algs

If all 3 edges are permuted correctly, rotate about UFR so that the misoriented edges are in the U layer
If one edge is permuted correctly, rotate about UFR so that it is in the RF position
If no edges are permuted correctly, rotate about UFR so that the edges are oriented (if possible)

Remember, you can use mirrors or inverses of the alg to affect the corners differently. I tried to get an algorithm for each case that starts/ends with U, R, and to aid in cancelations.
______________________________________________________________________________________

Case 1: Note that an optimal J-perm is also 10 moves (HTM) + AUF

U R2 B2 D2 L2 D' L2 D' B2 R2
______________________________________________________________________________________

Case 2:

U' R U' B U B' U R'
(R U' R' U) (R' F R F')

______________________________________________________________________________________

Case 3:

R' L F' R F' R' F' R F2 L'
______________________________________________________________________________________

Case 4:

R F R' D B R' B' D' F'

Case 5:

F' R' F D' L' F L D R
______________________________________________________________________________________

Case 6:

(U' R U R')

Case 7:

(R U' R' U)
______________________________________________________________________________________

Case 8:

U F' L F' L' F2 U'
F R' F' R2 U' R' U
F R' F' R2 U' R' U

Case 9:

U F2 L F L' F U'
U' R U R2 F R F'
F' U F U2 R U R'