Big Cube BLD Discussion

[Gabig]

In case you weren't aware, there's double the memo required for edges, so won't be able to simply use your 3BLD method.

Well, why not? I would use 24 letters (23 without buffor)
In 3x3 I use letter for every sticker not every edge so the number is almost the same.

[Mikel]

Well, why not? I would use 24 letters (23 without buffor)
In 3x3 I use letter for every sticker not every edge so the number is almost the same.

But there are still twice as many edge pieces on the 4x4 than the 3x3, so you will have to memorize and solve twice as many.

[Gabig]

But there are still twice as many edge pieces on the 4x4 than the 3x3, so you will have to memorize and solve twice as many.

yeah, i know, but method would be good
today I tried method Person>action>object with letter pairs, it's quite good, finally I had 3 short stories (person>action>object) and remember without problem, now it's time to add edges and corners

[Cube-Fu]

Personal shout out to Matt; congratz on the 5bld smash, who'd of thought a girraffe monkey could've used his hooves like that?

[Cubenovice]

When I was looking for info on solving big cubes blindfolded I found that you have to browse trough lots of threads to find good ways of dealing with parities.
Zane once started a thread for novice blindfolders but also that thread doesn't pop right up when searching for something like 4x4x4 blindfold parity.
I would like to start another thread specifically for big cube parities that is easy to find via the search function.

I was thinking of a thread title like "4x4x4 5x5x5 blindfold parity" so it is the first thing that pops up when using the search function.
In the thread we could collect parity info, links to existing usefull threads and example solves.

What do you guys think? Could this be usefull or shouldn't we make it too easy

Here's already a 5x5x5 example solve with parity I prepared earlier today.

This is scramble 1 from this weeks BLD race 2012-30
Bw2 R Uw U2 F2 L R2 D' F L2 Dw2 U' B' L' Bw Dw' Lw' U2 R2 B Fw' D' Uw2 L D2 Uw L2 U R' B2 L Bw2 Dw2 R2 D Bw' Fw Lw2 Fw2 F2 Dw' R' Fw L B' Fw' D Uw Lw2 B F' Uw2 Lw2 B Lw' Rw' F' L U B'

Full solve written out under spoiler tag, letters after // are my letter-pairs but I would replace these by actual targets.
And add some background info on the parity fixes.

Spoiler:

z2 // orient
// x-centers commutators
R' l u l' U' l u' l' U R // DF
D2 r' u2 r' U2 r u2 r' U2 r r D2 // KV
B r U r' u2 r U' r' u2 B' // IE
b' u b U2 b' u' b U2 // GC
D r r U2 r' d2 r U2 r' d2 r' D' // SN
L2 r U2 r' d r U2 r' d' L2 // TB
f' d2 f U' f' d2 f U // QJ
D' r' r' U r d r' U' r d' r D // PU
L r' U r d' r' U' r d L' // RW
R' f' U2 f d f' U2 f d' R // HX
D2 r' d' r' U r d r' U' r r D2 // OM
r d2 r' U r d2 r' U' // XD
// + centers commutators
M' u' M'U M u M' U' M M // BV
S u' S' U' S u S' U // AK
Rw b U b' E b U' b' E' Rw' //HS
S' u' S U2 S' u S U2 // ED
E' b U b' E b U' b' // CF
L M d M' U' M d' M' U L' // LG
L' E r U2 r' E' r U2 r' L // WI
d' M' U' M d M' U M // QT
b' b' U b E b' U' b E' b //PR
E r' U2 r E2 r' U2 r E // UO
D2 r' r' U2 r E' r' U2 r E r D2 // MO
// Wings r2
L2 B L2 B' r2 B L2 B' L2 // U
B' R B r2 B' R' B // B
r2 // G
F d R U R' d' R U' R' F' r2 // P
U' L U r2 U' L' U // V
B' R B U R2 U' r2 U R2 U' B' R' B // H
B L2 B' r2 B L2 B' // T
U R' U' r2 U R U' // W
l2 B' R B U R2 U' r2 U R2 U' B' R' B l2 // L
U' L' U r2 U' L U // S
B' R2 B r2 B' R2 B // Q
R2 U R2 U' r2 U R2 U' R2 // A
r2 // G
U R U' r2 U R' U' // R break into new cycle
R2 B' R2 B r2 B' R2 B R2 // X
L2 U' L2 U r2 U' L2 U L2 // E
U' L2 U r2 U' L2 U // M
l B' R B U R2 U' r2 U R2 U' B' R' B l' // O
l' B' R B U R2 U' r2 U R2 U' B' R' B l // C
r2 F R U R' d R U' R' d'F' // D
B' R' B r2 B'R B // J
U R U' r2 U R' U' // R
B L' B' r2 B L B' // F break into new cycle
U R2 U' r2 U R2 U' // I
B L B' r2 B L' B' // N
B L' B' r2 B L B' // F
// Midges M2
U' L2 U M2 U' L2 U // M
U R U' M2 U R' U' // R
L2 B L2 B' M2 B L2 B' L2 // U
M2 // G
B' R B M2 B' R' B // B break into new cycle
U' L' U M2 U' L U // S
U R' U' M2 U R U' // W
B' R B M2 B' R' B // B
B L' B' M2 B L B' // F break into new cycle
D M' U R2 U' M U R2 U' D' M2 // P
B L' B' M2 B L B' // F
U' F2 U M2 U' F2 U // parity
M' M' U' M' U' M' U2 M U' M U' M U2 M // flip D
// Corners Old Pochmann
D' R U' R' U' R U R' F' R U R' U' R' F R D // R
D R2 U' R' U' R U R' F' R U R' U' R' F D' // T
D F' R U' R' U' R U R' F' R U R' U' R' F R F D' // M
R' F R U' R' U' R U R' F' R U R' U' R' F R F' R // E
F R' R U' R' U' R U R' F' R U R' U' R' F R R F' // J
F' R U' R' U' R U R' F' R U R' U' R' F R F // V
F R U' R' U' R U R' F' R U R' U' R' F R F' // G
// parity fix
y2 R U R' U' Rw2 F2 U2 r2 U2 F2 Rw2 U R U' R'

View at alg.garron.us

[Zane_C]

Interesting proposal, I think this will be very helpful.

What do you guys think? Could this be usefull or shouldn't we make it too easy

Haha, good point. :P

If people come across this thread via the search function, that means they're looking for help with big cube BLD parity. I imagine if they can't find anything through the search function, they'll be quite eager to ask in the one answer BLD question thread (or perhaps in an entirely new thread). If this proposed thread is created, the number of questions posted concerning big cube BLD parity will be reduced. This means that the cubers who would've answered these repeatedly asked questions can put that time into helping others.

So even though this thread might make it seem "too easy" for the novice cubers, it should also make it easier on the more experienced cubers.

[CHJ]

Of all the times i've tried the 4BLD, i have only ever come across a near solve once, 2 corners were misaligned. Its not that i don't know how but recognising it, as for my good attempt it had both parities so i have an idea of whats going on. i have problems looking for edges, it take 20 minutes to memo and i hate it, execution is fine. Centers i have a mix of pains, the intuitive side of things usually make me swap two pieces at the end or something and end up counting 23 pieces in position, anything to help my edge recognition and centre placement?

Btw i do centres first, then edges finishing with corners, same as memo, corner audioloops don't work on me.

[AbstractAlg]

As far as I figured out, you get used to edge placement. If every edge has it's letter, you'll just get used to which edge (left or right) is about when you recognize the first color of edge.
If you use r2 you can track setup moves to see which piece would go to buffer for that current edge in buffer.

For centers, get used to corner commutators, then centers will be quite easy yet you need strong visual representation of the current cycle (or just tap pieces to visualize where they are) and practice. My first center solving took 13mins, next attempt took 4mins, so it's about practice.

Hope this helps a bit.

Also, fast 4bld and 5bld guys, do you count pieces or just ahve big faith that you covered all the pieces/cycles?

[DrKorbin]

Also, fast 4bld and 5bld guys, do you count pieces or just ahve big faith that you covered all the pieces/cycles?

I do count number of pieces and cycles, though sometimes I miscalculate. But sometimes it helps me to find out there is a 2-cycle somewhere, especially when the number of cycles is huge.

[Zane_C]

Also, fast 4bld and 5bld guys, do you count pieces or just ahve big faith that you covered all the pieces/cycles?

I don't count the pieces individually, but I do keep track of how many locations I've used. Because I know that for either +centers, xcenters or wings I should go through ~6 locations on average (24 targets).

So if I finish 2 letters into my 6th location, then I know that's 22 pieces cycled.
Likewise, if I finish 3 letters into my 5th location, then I've cycled 19 pieces - (If this happened, there would either be several pieces solved, or some unsolved pieces still in need of cycling).