F2L M slice *pairing* triggers

advincubing

advincubing

Regular
Joined
Jun 12, 2012
Messages
93
YouTube
Visit Channel
I just came across the M slice variant of (f R f'): U’ M’ R’ U R U’ M. I was familiar with the M' slice alg for back layer inserts where the pair is already formed (r’ U’ R U M’ ), but never thought about using M for pairing before.

Are there other common/efficient F2L algs using M slices for pairing (or splitting > pairing)?

This excellent post touches on the topic broadly. In terms of M slice pairing, it mentions (and dismisses as inefficient) only the U’ M’ R’ U R U’ M alg.
 
Last edited:
M U L F' L' U' M'
(U') R U' M' U' R' U R U r'
(U) M' U R U' M U' R'
M' U' R U R' U2 R U' r'
M' U R U' M U' R' U R U' R'
M' U R U' R' U R' U' r
R U R' U' r U R' U' M
M F' M'

Just some off the top of my head.
 
Last edited:
frogmanson said:
Just some off the top of my head.
Click to expand...
Wow. More than I thought. Some of not as efficient as a rotation, but some are really clever. I'm going to look at these closely.

frogmanson said:
M' U R U' R' U R' U' r
Click to expand...
Is there perhaps a typo in this one?

Thanks!

mark49152 said:
I found this video interesting and convincing.
Click to expand...
I agree. Cyoubx did a great job on that. I do agree with his conclusion that there are certain instances (last slot, for example) where wide turns and/or M slices are efficient ways of avoiding rotations (and presumably partial edge control).
 
Last edited by a moderator:
advincubing said:
Wow. More than I thought. Some of not as efficient as a rotation, but some are really clever. I'm going to look at these closely.

Is there perhaps a typo in this one?

Thanks!
Click to expand...

Ye, typo. Also, I would probably use all of these in solves. At the very least, they're good for edge control.

M' U R U' R' U R U' r'
 
Last edited:
frogmanson said:
M U L F' L' U' M'
(U') R U' M' U' R' U R U r'
(U) M' U R U' M U' R'
M' U' R U R' U2 R U' r'
M' U R U' M U' R' U R U' R'
M' U R U' R' U R' U' r
R U R' U' r U R' U' M
M F' M'

Just some off the top of my head.
Click to expand...
Wow, these are amazing!

I would do
 Twizzle link 
R' F R F' R U' R' U R U' R'
instead of the fifth one though, which is also rotationless.
 
Tao Yu said:
Wow, these are amazing!

I would do
 Twizzle link 
R' F R F' R U' R' U R U' R'
instead of the fifth one though, which is also rotationless.
Click to expand...

The cool thing about the fifth one (or all of them) is that it's also pretty good to use when the cases are a y2 away (in the back slot).
 
I have been aware of M slice pairing for about as long as I've known what F2L was. It is much more efficient with a free M slice, but If you leave the M slice free, you may as well use Roux. I have found though, that you can meet in the middle and leave just one M layer cross edge out. It works pretty well.
 
Artic said:
Could you give examples of this?
Click to expand...

Just take any one of the algorithms I listed and do a y2 and convert what I wrote into a new algorithm that solves the same case from a y2 away. For example (these are just random moves btw), M R2 U2 R' M', when you do a y2 and execute them from the back it becomes M' L2 U2 L' M. What I meant in the post you quoted was that algorithms with M moves can be easily execute from the back (a y2 away) instead of something like R' F R F' which would be executed as L' B L B' from the back.
 
frogmanson said:
Just take any one of the algorithms I listed and do a y2 and convert what I wrote into a new algorithm that solves the same case from a y2 away. For example (these are just random moves btw), M R2 U2 R' M', when you do a y2 and execute them from the back it becomes M' L2 U2 L' M. What I meant in the post you quoted was that algorithms with M moves can be easily execute from the back (a y2 away) instead of something like R' F R F' which would be executed as L' B L B' from the back.
Click to expand...

Shameless plug: Try the mirror buttons in the "Tools" section!

R' F R F' R U' R' U R U' R'
 
You must log in or register to reply here.

Similar threads

OregonTrail
F2L algs with no slice or double layer turns.
Replies
6
Views
1,377
miniGOINGS
miniGOINGS
Kevencito
I vibecoded a cubing app so you don't have to:)
Replies
0
Views
69
Kevencito
Kevencito
DA_BOY
Need help or tips for learning f2l look ahead
Replies
6
Views
251
Fred
Fred
O
Automatic F2L Pair Analysis for solver solutions
Replies
3
Views
269
abunickabhi
abunickabhi
zekoy091216
How to get f2l in 10 seconds
Replies
11
Views
553
Adnylzz
Adnylzz
Back
Top