good diets for 14 year olds

in the mid-1970’s, erno rubik invented therubik’s cube. but that doesn’t mean knew how to solve it. it took him a few moths to figureit out. by the time the first world rubik’s cubechampionships were held in 1982, the winner -- he could solve the cube in alittle less than 23 seconds. and these days?[news montage of collin’s record]

good diets for 14 year olds, this is world record holder collin burns, andtoday, we find out how he did it. [titles] “it could last another day; it could lastanother few years. the previous record lasted for just over 2 years. but with single solve,especially, you just need to get lucky. or

at least that’s a big part of it.” collin tends to downplay his skills but it’sworth noting there are two types of world records.the way speedcubing competitions work is that volunteers scramble the cubes according toinstructions that are generated by a computer, so competitors all get the same scramble. they do 5 solves and their three middle scoresare averaged. so collin holds the world record for a singlesolve. but the world record for an average scoreis held by a 19-year-old in australia. still, collin’s record is a huge deal. atthe competition where we met up with him,

kids were asking him for his autograph. he’s now being sponsored by a cube companyand by a cube retailer, which are paying for him to travel internationally. and he wantspeople to know, you could do this too. “the biggest misconception about cubingis that it’s difficult, which it really isn’t.”pop culture treats the rubik’s cube like some sort of iq test, but it’s not. at leastnot anymore. “generally average is much more impressivebecause you have to be consistently fast.” other kids were asking him for autographs.“are you that famous cube guy?” i recently bought a cube online and it camewith instructions for beginners. and if you

memorize those, you can solve the cube ina couple minutes. it helps to understand the design of the puzzle.at first glance, it looks like a cube made out of cubes — right, three layers of nine. but if you look closer, you’ll see therearen’t actually any cubes here. so that tells you that the corners will always becorners, the edges will always be edges, and the middle pieces determine the color of thatface. speedcubers will buy special cubes. they canlubricate them and adjust the tension. but the real key to their speed is efficiency- they’re looking several moves ahead, and they use fewer moves to get the same result.

so there are 43 quintillion possible arrangementsfor the cube. a few years back, some researchers borrowedcomputing power from google to find out that any scramble can be solved in 20 moves orless. they call it god’s number. but humans just aren’t that good. the beginners’ method that i learned uses100 to 200 moves. speedcubers use more around 50 to 60 moves.and they can do that, in part, because of the knowledge gained by the previous generationof speedcubers. when the cube first spread around the worldback in the 80s, people had to learn through trial and error.

this was happening in a lot of math departmentsand campus clubs. people were discovering the cube at the same time, and they were sharingwhat they learned. the method collin uses was developed by jessicafridrich, an engineering professor who was a college student at the time. it starts with a cross on one of the faces.and that face becomes the bottom layer. then what they do is solve the corners of the bottomlayer and the middle layer simultaneously. “so, now you can see that all of this issolved.” and for the final layer, they’re choosingfrom dozens of algorithms that they’ve memorized. and those are sequences of moves that messup the cube temporarily to move certain pieces

into place. and then put the rest of the cubeback where it was. the rubik’s cube has made a comeback inrecent years along with that same ethic of sharing tips and strategies. so all the resources you need are there, there’sjust one other thing. practice! this is collin nearly 5 years ago. world recordsare not built in a day.