Gah I feel like I am always under interrogation by you Tyson, but here goes:
With regards to the corner orienting alg: I suppose you can do it that way, yes. I just have a set of algs I use for certain corner cases. This also allows for easier memorization. For instance, when you see a Sune, you don't think "this corner has a twist of 1, this one of 2, etc". You see the pattern and know what to execute. This move doesn't hurt so much because it is nice and smooth for me; I found the move by using Cube Explorer. "Just to let you know, F D2 (L' B' L U')x5 D2 F solves all six-edges much more quickly." I have seen this alg somewhere before and it was interesting, but I tend to avoid moves that involve lots of L's (I am not very good with my left hand in terms of triggering). I tend to stick with algs that involve U, R, and F. Also if you wonder about processing information quickly, I was hoping my DDR videos would help hint at this. As you build certain reflexes to things you can glance at them or even do them without much thought. Even if there's a heavy arrow-load coming up the screen at 600+ beats per minute my fingers will just go automatically. It's strange when sometimes I will see a huge gross pattern and my hands are hitting them just fine, but my eyes are going "how am I reading this? I can't read this crap!" For example, PSMO is something I can barely see consciously with my eyes at that speed, but my brain/hands are faster and can read them more quickly. Consider when someone scares you -- you react before you consciously know what happened. I never said algorithm retention was hard, I just didn't care to practice speedcubing much anymore. I do it once in a while but not for speed. If I want to practice visual+speed simultaneously I play DDR, lol. As for memorization time, I didn't take note but I can estimate it was around this: 1.5 seconds for corner orientation, seeing all the U/D colors on the L face plus the easy pairs on the R face was too blatant to forget easily (the patterns on the R face I associate with a mental hook called a devil skull, similar to the cowskull OLL arrangement only the horns point "up" and not "out"). 4 seconds for the corners maybe. If you start at corner 1 you find that it's a very smooth curve as you turn the cube around, by this I mean you don't have to flip the cube around crazily each time you see a new corner. It starts on the left side and generally flows around to the right. I spent an extra second or so looking for that last corner pair. A quick glance at the D face shows that everything's fine down there in terms of edge orientation. There's an glaring orientation error on the F face on the right side, as well as the back (even more obvious since it's correctly permuted). The top layer has three wrong but the UF piece has a D color, so it's fine). This observation took maybe 3.5 seconds. Edge permutations, I see an arrow shape in terms of vector placements for the first four edges in the cycle. I keep my fingers on the edges as I observe. This also helps you keep track and lets you know where not to look. The second "cycle" curves down to a three-cycle vector-arrangement of edges going back with yet another curve starting from UF to DL identical to the one that begins this very cycle (UR to DF). If you understand vectors much, they can be picked up and thrown about. The beginning "vector" here is the same as the "end" vector of the cycle. In all, memorizing this took 7 seconds I am guessing. So a total of 16 seconds for memorization or so. Mind you that time is unusual and by no means average, but this solve is just loaded with streams and easy-to-recall patterns. As for handspeed, it might differ from yours. When I solve I don't stop to think much unless there's a really disgusting arrangement or parity error. This solve did not have a parity error, at that. Also in terms of handspeed, the edges were very fast for me. No awkward setups and very easy cycles. Try the moves I listed above, they are quick to fly through. Strangely enough I did not know of (R' F R F')x3! I will have to try this out. With regard to fast memory techniques, all I can say is move things into the realm of reflex. Stories and memory hooks and binary conversions are very effective for relays and larger cubes, but for the 3x3x3 at least, looking for recognizable corner patterns and thinking of cycles as visual vectors (Chris Hardwick can attest for the speedup in memory with this approach) will help tons. It is also useful to practice learning where a piece should go relative to the cube. If you see, say a red-and-yellow edge somewhere, you should instantly know where it should go relative to where you're looking. This will allow you to make a quicker vector arrangement. I am a little disappointed though! I thought that was a real solve. Why would you create a fake video? Anyways hope that answers your questions. --- In [email protected], Tyson Mao <[EMAIL PROTECTED]> wrote: > > Hi Everyone, > > I wanted to let everyone know that my solve was fake. I did not solve > the Rubik's Cube blindfolded in 1:13.37 seconds. (Though, when I hit > the timer, I did indeed read 1:13.37. Funny isn't it?) I saw the > solve and decided to practice a few times just to see what type of > execution I could do. You'll see that with a 23 second memorization > time (which of course was fake...) the execution time was 50 seconds, > which actually is quite doable. Anyway, this fake solve brought up a > few interesting points. > > I think 23 second memorization is near impossible. You'll notice my > tapping of the cube. Did I actually look at each piece when i tapped > it? The tapping, as one may assume, is me going through each piece in > the cycle. Well, to go from one piece to the next in the cycle, you > have to look at one position, process the piece, and then look to the > next position. You'll see that I don't really turn the cube so I'm not > really "looking" at the next position because I memorized it > previously, I already knew where it was. This is, of course, unless my > tapping was fake as well, but that would have been such a nasty > distraction. > > So I guess I'm very interested in what type of memory techniques are > used to memorize the cube in under 25 seconds. Even if I could look > around the three-dimensional cube that fast, how can one process > information in the mind so quickly? If you could process information > in a one-pass memorization format at 1 second per piece of information, > memorization of the cube could take place in about 30 seconds every > time. That, my friend, would be absolutely beautiful. > > Also, solving with absolutely no delays is very difficult at that > speed. If I'm moving a cube that fast, I'm focusing on the physical > moving of the cubes. If I slow down a little bit, which might increase > the overall physical execution time of the cube by as little as five > seconds, the execution would be mindless enough for me to think ahead. > > Anyway, I have some interesting question regarding the way Marcus did > the solve because 1:22 is 7 seconds faster than my fastest real solve. > Again, sorry for lying to everyone. > > The algorithm R U2 R2 F2 R' U2 F2 R U' R2 U' R2 U' F2 D R2 D' you used > to orient four corners... where did you find that? Did you find that > in A-cube or something? I'm wondering why you use this algorithm. Is > it because of hand pain or some reason? Because for five moves more, > you could execute that using a two generator (only R and U) and > furthermore, the 22-move algorithm for the four corner twist way easier > to execute than that 17 move pain in the butt you're using. Try a > "Double Sune (TM by Lars Petrus Grand Copywriter of All Cubing)" + a > U-permutation. An example of this algorithm is: (R U R' U R U' R' U R > U2 R')(R2 U' R' U' R U R U R U' R). I know the R' connected to the R2 > is redundant, but it illustrates the connectedness of the two > algorithms and the speed at which it could be done with. I would > definitely suggest using this algorithm as opposed to the 17-move > algorithm you have there. I could easily shave off a few seconds. > > Just to let you know, F D2 (L' B' L U')x5 D2 F solves all six- edges > much more quickly. > > Your general solve technique is very similar to what I used to do. > When I started BLD cubing in New Mexico, especially with the > orientations, I favored simplicity over efficiency. Unfortunately, the > sheer number of moves with me moving at maximum hand speed still > produced execution times of around 70 seconds. I'm much better now > that I'm able to find more artful solutions to corner orientations and > edge orientations (see hex-flip). For the corner orientation in this > case, I did y' [(U2 R U2 R')(U R U' R')]x2 y and then solved the > remaining three (which is probably faster unless your pair-corner > orientation of Sunes is absolutely insane). > > Anyway, you said you memorized this one relatively fast but didn't give > an actual time. I typically don't know the times of my memorization if > I don't look up at the clock. Anyway, if you had 15 second > memorization, that would leave under 70 seconds for the solve. Your > execution must be at the same hand speed as mine to accomplish this, > and you must be lacking delays in totality. How do you cube through > this hand pain? > > Also, is the reason that you remember these obscure BLD algorithms, > such as odd 4-twists and corner diagonal permutations, but not OLL and > PLL because you practice BLD more? Why are you using algorithms such > as (R2 U F2 U' F2 U' R2 U F2 U F2 U') in favor of more rudimentary > algorithms such as (R' F R F')x3, especially if algorithm retention is > difficult for you? > > By the way, my actual time for this solve was a big fat fail. > > Tyson Mao > Astrophysics '06 > California Institute of Technology > > On Feb 26, 2006, at 9:41 PM, kyuubree wrote: > > > (look at L face) R U2 R2 F2 R' U2 F2 R U' R2 U' R2 U' F2 D R2 D' > > (look at F face, then D face) U2 R' U' R U' R' U2 R U2 R U R' U R U2 > > R' > > (turn quarter turn clockwise) U2 R' U' R U' R' U2 R U2 R U R' U R U2 > > R' (back to F face) > > > > D2 R2 (corner cycle UBL UFL UFR) R2 D2 > > D' (R2 U F2 U' F2 U' R2 U F2 U F2 U') D > > B2 (corner cycle UFL UFR UBR) > > (U F2 U' F2 U' R2 U F2 U F2 U' R2) B2 > > > > F' (R2 D' R2 M2 4(M'U) R2 M2 D R2) F > > F2 (turn quarter turn clockwise) (M' U M' U M' U2 M U M U M U2) F2 > > (back to F face) > > > > U B' F' (edge cycle forwards) F B U' > > F2 B2 (edge cycle backwards) B2 F2 > > D B2 (edge cycle forwards) B2 D' > > D F2 (PLL alg, dual adjacent-edge swap) F2 D' > > > > > > 1:22 > > > > Memorization was very easy on this one but there were a lot of > > steps; the corner orientations were such that all U/D colors were on > > the L face, and there were two pairs of corresponding 2-1-corner > > twist orientations across the U and D faces on the R face. The > > corners took me the longest but in general there wasn't anything > > gross. The edges were very agreeable and didn't have any real > > issues at all -- no pausing needed, especially the last step which > > usually requires a bit of finaggling to get it to work (since the > > edge permutation cycles were in two large cycles, usually I simplify > > until the end and then figure out how to arrange them, but in this > > case it was a quick setup to a PLL alg). > > > > > > > > --- In [email protected], Tyson Mao <tmao@> > > wrote: > >> > >> D2 F2 U' F' D2 B' U' L F' D2 L F' L2 B2 F D' F' U2 D2 B D2 L B2 U2 > > D' > >> > >> I scramble white on top, green in front, and solve the same way. > >> > >> Tyson Mao > >> Astrophysics '06 > >> California Institute of Technology > >> > >> On Feb 26, 2006, at 2:01 PM, Pedro wrote: > >> > >>> Tyson...the crowd is asking for the scramble! Please...(at least > > one > >>> person...hahahaha) > >>> > >>> Pedro > >>> > >>> Tyson Mao <tmao@> escreveu: > >>> 1 minute 13.37 seconds > >>> > >>> http://www.astro.caltech.edu/~tmao/73.37BLD.AVI > >>> > >>> Tyson Mao > >>> Astrophysics '06 > >>> California Institute of Technology > >>> > >>> > >>> > >>> SPONSORED LINKS > >>> Jigsaw puzzle game Free puzzle inlay games > > Educational > >>> game and puzzle Word puzzle game Kid puzzle game Puzzle > > games > >>> > >>> --------------------------------- > >>> YAHOO! GROUPS LINKS > >>> > >>> > >>> Visit your group "speedsolvingrubikscube" on the web. > >>> > >>> To unsubscribe from this group, send an email to: > >>> [EMAIL PROTECTED] > >>> > >>> Your use of Yahoo! Groups is subject to the Yahoo! Terms of > >>> Service. > >>> > >>> > >>> --------------------------------- > >>> > >>> > >>> > >>> > >>> > >>> --------------------------------- > >>> Yahoo! Acesso Grátis > >>> Internet rápida e grátis. 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