Random Blindfold Cubing Discussion

Today I learned a cool fact! This fact has already been discovered I'm sure, likely by qq or those with a strong interest in the math behind the cube. Today I found that memorizing the order of a shuffled deck of cards is very nearly the equivalent of doing a 4x4x4 + 3x3x3 BLD relay. If someone already posted this I either did not remember or did not notice, but I found this so cool to know that those two events are so comparable!

\( \frac{log(52!)}{log(\frac{7!*3^6*(24!)^2}{24^6}*43252003274489856000)}=1.0367 \)

I did a 2-4 BLD relay today, where can I learn to memo decks?
 
Today I learned a cool fact! This fact has already been discovered I'm sure, likely by qq or those with a strong interest in the math behind the cube. Today I found that memorizing the order of a shuffled deck of cards is very nearly the equivalent of doing a 4x4x4 + 3x3x3 BLD relay. If someone already posted this I either did not remember or did not notice, but I found this so cool to know that those two events are so comparable!

\( \frac{log(52!)}{log(\frac{7!*3^6*(24!)^2}{24^6}*43252003274489856000)}=1.0367 \)

That's really interesting that the permutations are so similar, Thanks. In terms of actual memo, they feel so different.

EDIT: username, you can just make 52 images from your letterpairs for the cards and use loci like you would for BLD.
 
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I did a 2-4 BLD relay today, where can I learn to memo decks?

Look up the yahoo group for memory sports, they have a lot of information available and a great community of fellow memory sports enthusiasts.

That's really interesting that the permutations are so similar, Thanks. In terms of actual memo, they feel so different.

I guess I should use Michael's terminology here: they are very nearly the equivalent amount of information to memorize. The structure to memorize them is very different, but they are a roughly equivalent "cognitive load" I guess you could say. This is a very pencil on napkin kind of calculation, but a neat result nonetheless!
 
Could someone give me ideas for a long term goal in BLD solving? My current short term goal is sub 30 5BLD (already like 7 DNF's sub 30, some really close) which should be fulfilled really soon.
 
Could someone give me ideas for a long term goal in BLD solving? My current short term goal is sub 30 5BLD (already like 7 DNF's sub 30, some really close) which should be fulfilled really soon.

I would recommend to structure your goals for your methods. Your long term goals might be something like create a double letter image system, or learn to associate the algs you would execute to the image/word itself rather than associating the image to the pieces on the cube.

Setting your BLD goals to getting sub-X makes for slower improvement overall than setting your goals for "Make my method better by..." type goals. This is all in my opinion.
 
Thanks. I actually have thought that that letterpair-alg association could be good to learn. Also, full 3-style

It's painful, but a way to learn quickly is to not allow yourself to solve until you are done learning. When I first decided to switch to double letter images I kept being lazy and not working hard on my list. To fix this, I told myself that I could not do another BLD solve until I had a full double letter image list created and I had begun learning it. I think this resulted in a nearly two month break from BLD solving, but it was so worth it.

Whatever you're learning, don't do another solve until you have finished whatever it is. You might put your sub-30 5x5x5 BLD goal on hold for a bit, but I'll bet just simply learning the new stuff would push you well past sub-30. Compare that to working hard now to get a 29:xx or 28:xx solve in the next few days or week or two.

Again, this is just my opinion.
 
Double letter = letter pair? I use letterpair images currently, but I come up with them on the spot. Also, I use the english language even if it is only my third language, that might slow me down a but aswell.

Does it sound good to just switch to 3-style without any "progression"? I fully understand Comms (Pure and A9) and I understand setup moves. I might do so that I continue doing BLD solves, but use full 3-style instead of M2/OP.

I'm currently working on an excel file with comms for wings, middles and corners +letter pair images.
 
Double letter = letter pair? I use letterpair images currently, but I come up with them on the spot. Also, I use the english language even if it is only my third language, that might slow me down a but aswell.

Yes I meant letter pair (I've been away from the forum for a while and I guess I'm forgetting some of the terminology).

I would say it's always good to have mostly prepared images for your letter pairs. Any time not spent thinking up a new image for a certain letter pair is time that is instead spent memorizing those two pieces. So I would say continue writing out your list of the images you are either already using or would like to use for each letter pair.

Does it sound good to just switch to 3-style without any "progression"? I fully understand Comms (Pure and A9) and I understand setup moves. I might do so that I continue doing BLD solves, but use full 3-style instead of M2/OP.

I'm currently working on an excel file with comms for wings, middles and corners +letter pair images.

I don't think the specific method really matters that much, but you definitely want to reduce your thinking time to as little as possible from recalling an image to executing an alg. The algs list (and images lists) you're coming up with sounds like a great idea. I've heard people say on the forum here that the ideal situation is for you to recall an image, and then know which alg to execute without having to picture where the pieces are.

I recall the image, picture the pieces, then execute the alg. This is slower, but still can be done quickly. That would be the next thing I need to work on, but this gives you an idea of what people say to try for. Try not to do what I do, and try instead to recall image -> recall alg directly as much as you can.
 
What about Letter Pair? How it's possible to improve this technic without make errors by creating (because of difficult) only letters? I'm trying letter pair and, when I memorize, after a bit, I'll create only letter not paired (ex: from DoG PLay CoKe to DGPLCK). That's a problem I think!
Thanks.

Davide
 
I'm trying letter pair and, when I memorize, after a bit, I'll create only letter not paired (ex: from DoG PLay CoKe to DGPLCK)

That IS the correct way to use letter pairs :)

your letter pair for DG = dog, PL = PLay and CK is Coke

For me this would be DoG, DeGen, PaaL, PooL and Calvin Klein.
Yes, for many letter pairs I have more than on image in my list.
 
Using this kind of calculation, how does megaminx compare to big cubes - 4x4x4 or 5x5x5 or 6x6x6? And while you're at it, it would be great to calculate gigaminx as well.

(Sorry - I know I'm being very lazy to not do it myself.)

Hmm... I hadn't thought about that. Here are some other interesting comparisons I found when looking further into it. These comparisons are looking into the information load so to speak, or the space of the number of possible combinations of the puzzle/attempt.

Megaminx BLD is pretty closely equivalent to memorizing one deck of 52 cards.
\( \frac{log(20!*30!*3^{19}*2^{27})}{log(52!)}\approx1.0014 \)
By extension this also makes megaminx BLD roughly equivalent to a 4x4x4 + 3x3x3 BLD relay as well as a 4x4x4 + three 2x2x2s BLD relay.

---------

Gigaminx BLD is pretty closely equivalent to a 8x8x8 + two 3x3x3s + 2x2x2 BLD combo solve.
\( \frac{log(\frac{20!*30!*3^{19}*2^{26}*(60!)^3}{(5!)^{24}})}{log(\frac{43252003274489856000^2*(7!*3^6)^2*(24!)^{12}}{24^{54}})}\approx1.0007 \)
 
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That IS the correct way to use letter pairs :)

your letter pair for DG = dog, PL = PLay and CK is Coke

For me this would be DoG, DeGen, PaaL, PooL and Calvin Klein.
Yes, for many letter pairs I have more than on image in my list.
Ok. I have to do CoKe Dog...
...but I do CKDG!
How can I train to not to do this?
 
and gigaminx is about 8x8x8 + 4x4x4

That's cool, by extension of what I found then that means that a 4x4x4 is very close in information to two 3x3x3s and a 2x2x2. I didn't know that. The correlation seems to be pretty close.

\( \frac{log(\frac{7!*3^6*(24!)^2}{24^6})}{log(43252003274489856000^2*7!*3^6)}\approx1.0007 \)
 
@Chris How did the talk on commutators go with the Mensa group you mentioned a few months ago, by the way? I wasn't sure if you posted anything, but I've been pretty keen to see how it went! Trying to teach M2 to a group of cubers was hard enough, but commutators to non-cubers...
 
@Chris How did the talk on commutators go with the Mensa group you mentioned a few months ago, by the way? I wasn't sure if you posted anything, but I've been pretty keen to see how it went! Trying to teach M2 to a group of cubers was hard enough, but commutators to non-cubers...

It went very well! I realize that I dropped the ball on posting about it. I've had a lot of things going on in my life lately, the biggest one being that my girlfriend Katie and I are engaged! :D :D :D We've been busy as of late spending a lot of our time together, and we've really started wedding planning in earnest now! I'll try to get a short writeup about the cube talk as well as the powerpoint posted by sometime this weekend, I should have some time before Monday.

As for the talk, I still have the powerpoint presentation I used, and I can mention after what I remember of it too. My goal was not to have people memorize any specific commutator, or commutator class or anything like that. I did want them to walk away with the process, which I described as:

1) Identify a slice, then come up with a series of moves to destroy exactly 1 piece on that slice
2) Turn the slice
3) Undo the moves you did to destroy the piece
4) Undo the slice turn

Basically I showed them an ABA'B' commutator, leading to things like Toss Ups, Drop and Catch, etc. I then demonstrated tons of toss up and drop and catch style commutators on a computer cube projected up on a screen.

Sorry for the delay, and I will try to have at least a short description up by this weekend!
 
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