7 ms·
Speedcubing kid can skip last layer by learning 3915 algorithms for every case
- chris_wot 4y agoSo… the better link is here: https://www.reddit.com/r/Cubers/comments/whuhkq/i_learned_full_1lll_with_proof/ https://www.reddit.com/r/Cubers/comments/whuhkq/i_learned_fu...
- klyrs 4y agoThat's just a badly implemented redirect to https://youtube.com/playlist?list=PLRfiRupL1WHMiwO10094hkuFS5dqYRwu7 https://youtube.com/playlist?list=PLRfiRupL1WHMiwO10094hkuFS...
- rpmisms 4y agoThis is pure insanity. The algorithms do pass out of active memory and into long-term muscle memory, but 144 a day is ludicrous.
- xdfgh1112 4y agoTechnically 144 a week, but yeah. That's a stretch even with spaced repetition. On the other hand OP is doing 15 second solves, i.e. 240 solves an hour (1hr per day) plus a lot more on the learning day, so cycling through all the 1LLL algorithms fairly frequently.
- tiahura 4y ago"The ability to play chess is the sign of a gentleman. The ability to play chess well is the sign of a wasted life."
- wyre 4y agoPaul Morphy https://en.m.wikipedia.org/wiki/Paul_Morphy https://en.m.wikipedia.org/wiki/Paul_Morphy > Returning to New Orleans in late 1859 at the age of 22, he retired from active chess competition to begin his law career. Morphy never established a successful law practice and ultimately lived a life of idleness, living on his family's fortune. Despite appeals from his admirers, Morphy never returned to the game, and died in 1884 from a stroke at the age of 47.
- karmakaze 4y agoSimilarly, Tenuki in Go is to ignore and not respond to the last move and instead initiate play elsewhere. I saw a Go comic strip where the best move was to leave the board and do something else.
- ofrzeta 4y ago"The only winning move is not to play."
- joenot443 4y agoMost of the best speedcubers from the late 2000s era when I used to follow the "scene" went on to work in FAANG or mathematics research or quant something similarly difficult and analytical. There's no real future in cubing, I saw it as a way for especially gifted teens to demonstrate to the world how excellent their minds were at computation and pattern recognition. Not dissimilar to track or football or spelling, some young people possess the individual burning flame to want to be the best and personally I love watching them do so.
- kergonath 4y agoThat is properly, genuinely impressive. I spent quite a lot of time finding the “simple” algorithms on my own, but this is a whole other world. Remarkable!
- stavros 4y agoIs there any link that has context? The link and the comments just point to a YouTube channel of someone practicing?
- v64 4y agoThe context of the video is to demonstrate to technical speedcubers that he's achieved the feat he claims. By showing his solves on video, speedcubers can tell that he's using the algorithms he claims and not more common techniques to obfuscate the achievement. The length of the video is to provide even further evidence of the claim. Edit: The achievement is that he's been able to minimize the number of turns he needs to complete the cube by memorizing ~4000 edge cases and the specific turns needed to solve the cube from those configurations, as opposed to generalized algorithms that require memorizing less edge cases at the expense of more turns. This has been a known possibility since 2011, but this is the first documentation of someone demonstrating mastery of it.
- stavros 4y agoHmm I see, thank you. How do we know that he hasn't just learned the specific cube he's solving in the video, though? Is there some verifiable source of randomness?
- v64 4y agoI'm not a member of the speedcubing community (only adjacent to it through acquaintances), but as far as I know, the website he's using is standard in the community and those in the know who have viewed the video acknowledge it as legitimate.
- stephc_int13 4y agoIt seems like human computers can be a thing. Frank Herbert was not completely out of his mind. https://en.wikipedia.org/wiki/Organizations_of_the_Dune_universe#Mentats https://en.wikipedia.org/wiki/Organizations_of_the_Dune_univ...
- vardump 4y agoHuman computers have been a thing before electronic computers. It was an occupation. https://en.wikipedia.org/wiki/Computer_(occupation) https://en.wikipedia.org/wiki/Computer_(occupation)
- emkoemko 4y agobetter link?
- klntsky 4y agoThis is too much for a human. It may be that there was another computer screen not shown on video, displaying particular steps to perform. Not saying I think it's fake, but the supposed proof video does not actually prove anything.
- rpmisms 4y agoIt's really not. It's just hard.
- robswc 4y agoI know people can remember things sequentially really well with practice... maybe patterns are easy to remember? I'm skeptical but also have no authority on memorization or rubiks cubes... I've also seen crazier things lol
- rpmisms 4y agoAs long as you can get them into muscle memory, they're literally hard to forget. I stopped cubing for 4 years, every algorithm was exactly where I left it mentally.
- xdfgh1112 4y agoOnly one person has done it. That's beyond "hard" and into "you need a very unique type of brain", imo. Many other people have tried it and failed.
- rpmisms 4y agoSpeedcubing is extremely communal. Once the 6-second barrier was broken, 3 other people did it the same day. It's a mind game, and I'll bet we'll see another person who does this within a year.
- xdfgh1112 4y agoInteresting. Maybe it was a psychological barrier like you say. Certainly it's easier to motivate yourself to do something if someone else has provably done it!
- xiphias2 4y agoThe coolest things with humans and internet is that now that a person showed that it's possible to achieve in a year, others will replicate it.
- cgearhart 4y agoSame thing happened with Tetris. For a long while it was dominated by a few folks who could hyper tap, but then someone figured out rolling—which is something “anyone” can do + even faster than hyper tapping—so that seems to be what everyone is adopting at top tier. For rolling it started with one guy and then a few months later there were like half a dozen including a couple of the hyper tappers.
- RosanaAnaDana 4y agoA hackernews thread, about a tweet, which is a reddit screenshot, that is actually a link to a youtube video. This is why we can't have nice things internet friends.
- ghayes 4y agoReddit thread with author: https://old.reddit.com/r/Cubers/comments/whuhkq/i_learned_full_1lll_with_proof/ https://old.reddit.com/r/Cubers/comments/whuhkq/i_learned_fu... YouTube playlist by author: https://youtube.com/playlist?list=PLRfiRupL1WHMiwO10094hkuFS5dqYRwu7 https://youtube.com/playlist?list=PLRfiRupL1WHMiwO10094hkuFS...
- xwdv 4y agoI came here from LinkedIn.
- motoboi 4y agoLink was in a qr code on a business card.
- fshr 4y agoThey gave me their card in a VR meeting on my OcculoQuestXCubeRift
- herodoturtle 4y ago“They” were a DALL-E visaged AI assistant.
- jareklupinski 4y agoi was linked here by a Messenger group chat :P
- firecall 4y ago
- 4y ago
- tzs 4y agoI knew someone who had a ton of algorithms for very specific cases. So if he needed say an edge 3 cycle that did not disturb anything else he knew a ton of different edge 3 cycle for all kinds of different 3 edge combinations. One day several of us were sitting around playing with our cubes, and he hit some position where none of his algorithms worked and was stuck while he tried to find a new algorithm for that position. We asked why he didn't just use a conjugate of one of his other algorithms. That was how the rest of us did it. I for example knew one edge 3 cycle that didn't disturb anything else. Call it T. If I needed any other edge 3 cycle I'd just find some transformation g such that gTg' did what I wanted, where g' is the inverse of g. gTg' is called a conjugate of T, and the set of all gTg' is called the conjugacy class of T. It's easy to find g, because it doesn't matter how much g messes up the rest of the cube. All that matters is that it moves the 3 edges I want to permute into the position they need to be for T. Whatever else g messes up will be restored by g'. He was astounded when we showed him that approach. It had never even occurred to him that such a thing was possible. The funny thing is he was a math major, and had taken (and passed with a good grade) an abstract algebra course. He definitely knew about conjugates of group elements. He had just never noticed that group theory was applicable to Rubik's Cube.
- ced 4y agoMaybe I'll just show my algebraic ineptitude, but how do you know that g' restores "everything else"? I get that gg' = I, of course, but gT*g'? Rubik cube algebra isn't commutative, is it?
- zeroonetwothree 4y agoThe part that is important is T has a very specific effect, such as rotating three corner pieces, that doesn’t change most of the cube. Then you pick a g that doesn’t affect those pieces either (except in the way that you want) so that gTg’ does what you want. It doesn’t work in general for any arbitrary T of course since it’s not commutative as you noted. This is more of a cubing thing than an algebra thing.
- tzs 4y ago
- motoboi 4y agoAnd 1 year from now 5 year olds will do this routinely.
- theGeatZhopa 4y agoI can't handle that
- turboponyy 4y agoTechnically not a skip, just finishing the last layer using one look (1LLL). A last layer skip in the CFOP method would be when the last layer ends up in the solved configuration as the first two layers (F2L) are finished.