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Big Cube BLD Discussion

qaz

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no duh. where is the documentation on it though? googling "U2 method" brings up every method that has an algorithm with U2 in it, so that isn't very useful.
This is a good tutorial:

It is the second result on google btw.
 

mark49152

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for a 4x4 you can swap the edge pairs across one face like a T-permutation but without swapping the corners, am I right?
Yes but you can't swap corners without swapping dedges, so you still get parity situations. Parity is kind of independent for corners, edges and centres.
 

mark49152

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Actually I have a question about this. At the moment, centre memo is my slowest stage. I went with audio because I thought it would be faster, but I am having trouble getting the memo to stick without repeated reviews, and recall mistakes on centres is perhaps my most common reason for DNFs.

My question is this: are centres (typically 16-18 targets) too much information for fast, short term audio memo? Should I just keep practising, or am I on the wrong path using audio for this?
Quoting myself and bumping this question, because I only got one response, and I'm still struggling with this and interested to hear other blinders' thoughts.

I'm also considering switching to executing corners first with audio, but I'm still using OP (partly) and I know it's not centre safe. And parity certainly isn't. Does anyone have any tips for executing corners before centres?
 

CyanSandwich

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Quoting myself and bumping this question, because I only got one response, and I'm still struggling with this and interested to hear other blinders' thoughts.

I'm also considering switching to executing corners first with audio, but I'm still using OP (partly) and I know it's not centre safe. And parity certainly isn't. Does anyone have any tips for executing corners before centres?
Audio for centers is great if you can handle it. I can barely do audio edges so I do corners first for bigBLD.

OP is center safe in multiples of 4. So if you have 4 or 8 targets, great. If you had 6 targets, you could force one comm and the rest OP. Otherwise just use whatever nasty setup moves you can think of and use full comms.

With parity, execute your last 3-cycle as Buffer>Target>UBR (assuming you do PLL parity + T-perm).
What I do is put my feet together, then at the end of everything, check if my feet are together and execute parity.
 

Jacck

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OP is center safe in multiples of 4. So if you have 4 or 8 targets, great. If you had 6 targets, you could force one comm and the rest OP. Otherwise just use whatever nasty setup moves you can think of and use full comms.
Seems that you use perms only, where the centers are rotated in one direction (otherwise 3 y-perms (3*ccw) and 1 j-perm (1*cw) would not be centersave).
Why don't you use with 2 or 6 targets once the perm inverted?
 

CyanSandwich

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Seems that you use perms only, where the centers are rotated in one direction (otherwise 3 y-perms (3*ccw) and 1 j-perm (1*cw) would not be centersave).
Why don't you use with 2 or 6 targets once the perm inverted?
Oh, I didn't know j-perms were the other direction. So Mark, just keep in mind Y-perms do a U' and J-perms do a U.
I haven't used OP in a while, but when I did it was full Y-perms, except for UBR.
 

mark49152

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Thanks guys. I tried a few solves corners first but I think the OP complications and deferring parity until later will frequently trip me up. It's more to think about when I'm already struggling to get faster, and I really prefer solving centres first, I'm used to it and it now feels like the natural order.

I also experimented with splitting centres into two sequences, so memo the first part visual and the second part audio, then execute in reverse order. That might hold better promise for me and it also has the flexibility that I can do more or fewer targets as audio depending on how I feel or how easy the scramble or memo are. I'll continue with that for a while and see how it goes.
 

Jacck

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Oh, I didn't know j-perms were the other direction. So Mark, just keep in mind Y-perms do a U' and J-perms do a U.
I haven't used OP in a while, but when I did it was full Y-perms, except for UBR.
This was only an example! It depends really on which perm you use. I just know this j-perm:
R U2 R' U' R U2 L' U R' U' L
just count the "U"s and you will get as sum an U', the center is rotated ccw. The inverse will have a sum of one U, the center will be rotated cw.

That means, you should check your perms, before using them with OP before the centers ;)
 
D

Daniel Lin

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I mean... yes :p

Can you be more specific?
is there a good fingertrick and is it worth it?
or should you learn longer MU algs

how would do you DF LU LD

edit: bad example because this one obviously 8 move M is better
 

CyanSandwich

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is there a good fingertrick and is it worth it?
or should you learn longer MU algs

how would do you DF LU LD

edit: bad example because this one obviously 8 move M is better
I can't help you there because I don't even use S algs for 3bld. Give me some S algs that you think could be better than longer M ones on 5BLD.
 

Jugurtha

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Hi guys,
Just started very recently 5BLD, I am now wondering about the order of execution. Basically this is at the moment the structure I'm using:
- memo X and + centers, same room but different locations; usually 3 locations for each
- memo wings in another room, 3 locations as well; in case of parity I just add my UB target at the end of my memo
- memo midges in the 3rd (2 locations max) + corners as a very simple image or audio, depending on the situation (I'm using audio for edges on 3BLD FYI so that's why I keep the corners here mostly as an image)
- execute corners, only comms so no worries about my centers. In case I have parity I add UFR as my final target (UBL buffer), therefore I'm creating an additional corner comm (I solve it at the very end of the solve in this case).
- execute midges and manually swapping UL and UB at the end (setting up to a nice Y perm + parity for the end of the solve)
- execute wings
- execute centers, X and +
- solve wings parity (many many thanks to Robert Yau for his fantastic algs) and corners/midges parity

Two questions:
- Any comments on this? I know it overall works, IIRC Marcell used that strategy a few years ago, from what I remember on his WR videos. Probably true for other people as well.
- Wondering about memoing flipped midges right now; I just forgot one in my last attempt, that otherwise would have been successful (and my 1st ever success BTW). Should I add it in another location in my "centers room" in order not to forget it? Or just remember it visually as I'm doing for 3BLD? Or just solving as 2 targets during my midges execution? Any other solution?

BTW I'm still a very beginner, so right now I'm trying to find unoccupied rooms that I know really well, in order to be able firstly to go on 2 consecutive attempts of 5BLD, and eventually to do a 2/2 5BLD.
 

mark49152

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Is it bad if I use full audio on 5BLD (and every BLD)? If yes, when and how should I switch to something else?
Do you mean audio or sentence memo? I suspect many people who say audio mean sentence.

MV FR TE AG

Sentence: There's mauve fur in my tea, Agnes

Audio: muv-fer-tee-ag

Sentence works for big BLD but audio is too short term.
 
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