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Joined
May 25, 2013
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2014FREY01
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Nilsibert
I've picked up cubing again and decided to improve my f2l. I found some great solutions for bad cases with flipped edges or pieces in wrong slot (or both) etc that can be solved with some neat algs. My problem now is, should I even bother solving cases where for example an edge is in the wrong slot, provided its like the first or second pair? Or is it generally better to look for easier pairs which will end up taking out that edge anyway when solving? Then again what if I don't see an easy case?
It seems to me that using algs makes most sense with the last pair. How would you go about this? Or will my decision making improve anyway as my look ahead gets better?
Which brings me to my second problem: look ahead with certain algs. Take this for example; Rw' F U' R U M'
Cool case and all, but I have a hard time looking ahead when doing it. And if it's the first pair, should I even bother or is it better to look for an easier one? That edge will end up being taken out of that slot anyway.

tl;dr: how to decide when to use advanced solutions for weird cases and how to look ahead when doing so?
 
Joined
Jul 2, 2019
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Hey guys,

I've been cubing for a while and I'm a bit stuck at a point. My times are hitting 30s now for 3x3x3, but I'm a bit confused at how I should be progressing at F2L.

I learnt a lot of the F2L cases and it really helped, but of course the F2L algs are always oriented assuming you are inserting into the front right slot. Because of this, I always identify my next pair, turn the cube to the target slot, and then execute the alg (or intuitevly solve it).

Of course, everyone says the same thing, "To improve your F2L times you have to get comfortable inserting into the back slots", and, "you shouldn't be turning the cube". So here is where I'm confused. If the F2L cases are assuming front right target slot, then how am I supposed to apply them and insert into the back slots (or even the front left slot) without turning the cube?

In addition, making B moves when pearing up is terribly slow, and I've seen some example solves where they say to turn the cube instead of making B moves.

So, what should I be doing?

Sorry, I'm pretty confused!

Thanks!
 
Joined
Sep 4, 2018
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There is a little bit of misconception about back slots of f2l. What you should be capable of doing is executing all your f2l algs from both front and back left and right sides(as in the alg and its mirror) . What you should do for your first pair if you can execute and pair it in the front or back without cube rotating then do so, however if you have to rotate to perform your alg then rotate to have it in the back therefore your front slots will be empty. Your goal is to simply keep as many front slots empty as possible while not ever having to do a y2 in your f2l the only allowed cube rotations for f2l are y and y' as long as you can't do your pair from your current spot(if you can do it from your position front or back then don't rotate). In doing say the 3rd pair and you find yourself in need of a rotation, turn the cube so that the forth pair's location is on the front even if that means making the 3rd pair on the front too.

I hope this helped you better understand how to do f2l pairs in the back.
 
Joined
Apr 1, 2017
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Galar Region
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2015MANN01
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Aerma
There is a little bit of misconception about back slots of f2l. What you should be capable of doing is executing all your f2l algs from both front and back left and right sides(as in the alg and its mirror) . What you should do for your first pair if you can execute and pair it in the front or back without cube rotating then do so, however if you have to rotate to perform your alg then rotate to have it in the back therefore your front slots will be empty. Your goal is to simply keep as many front slots empty as possible while not ever having to do a y2 in your f2l the only allowed cube rotations for f2l are y and y' as long as you can't do your pair from your current spot(if you can do it from your position front or back then don't rotate). In doing say the 3rd pair and you find yourself in need of a rotation, turn the cube so that the forth pair's location is on the front even if that means making the 3rd pair on the front too.

I hope this helped you better understand how to do f2l pairs in the back.
This is good. Also, don't use algs for everything - only the especially difficult cases that can't really be efficient without algs.
 
Joined
Sep 14, 2018
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My Desk
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2018BRUM01
PRACTICE. while practice really is the most important thing, it is also very useful to find efficient ways to pair things up, and implement them into your solves. Lazermonkey has a pretty good video on all of the f2l cases. One thing that can really help, is doing slow solves and trying to pair things up in a different way.At first I would avoid learning algs, but once you get to about sub 20, I would start finding f2l algs to prevent rotations. Hopefully that helps, and tell me if you need help with anything else.
 
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