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  1. Solving The Rubik's Cube in 20 Seconds - Chris Hunt - Github
  2.  
  3. * steps
  4.   - buy a cube
  5.   - turn the cube
  6.     - the centres don't move, they are your reference point
  7.     - two types of pieces, edge pieces in layers, and corner pieces (8x 4 on top layer, 4 on bottom layer)
  8.     - learn algorithms
  9.     - master it
  10. - algorithms
  11.   - notation
  12.     - r -right, u - up, l -left, d - down, f - front, b - back
  13.     - all moves clock-wise
  14.     - M move notation ( middle slice one turn clockwise)
  15.     - prime notation means move counter-clockwise
  16.   - trivia
  17.     - 43 quintillion 43,252,003,274,489,856,000 positions on a rubik's cube
  18.   - 2-cycle solution (aka Bicycle)
  19.     - focuses only on two pieces at a time
  20.     - solves in about 2 minutes
  21.     - requires set-up, fix and undo
  22.     - four steps
  23.       # swap edges (only focusing on two pieces at a time) algorithm is noted -  R U R' U' R' F R2 U' R' U' R U R' F'
  24.         - praxis
  25.       # swap corners (again focusing on two pieces at a time) algorithm is noted - U F R U' R' U' R U R' (I couldn't type it out fast enough before he changed the slide so it's incomplete, he's going to publish the slides)
  26.         - praxis
  27.       # rotate edges (again focusing on two pieces at a time) algorithm is noted - M' U M' U M' U2 M U M U M U2
  28.         - praxis
  29.       # rotate corners (again focusing on two pieces at a time) algorithm is noted - R' D R F D F' U' F D' F' R' D' R U
  30.         - praxis
  31.   - ruby gem (chrishunt/rubiks-cube)
  32.     - kociemba two-phase solution
  33.       - breaking down the solving into two pages, scrambled -> oriented -> solved
  34.       - eval. sum of moves in first and second steps
  35.     - cube explorer is an interactive program to solve and practice
  36.   - algorithms to solve rubik's cube in 20 seconds
  37.     - techniques: fridrich, petrus, roux, zz (or you're a genius)
  38.     - recommend fridrich because it's the most popular (great natural progression from the bicycle solution)
  39.     - fridrich is also known as CFOP
  40.       - cross, solving four edge pieces
  41.       - f2l, first two layers... build up from the cross and solve the two layers at the top and bottom of the cube
  42.         - set-up and undo moves are all you need for this... and practise
  43.         - praxis
  44.       - oll (orient last layer)
  45.         - take all pieces in the last layer and flip them
  46.         - you'll need to memorise 57 algorithms (however, you've already learned two and that's all you need to complete... the others will make you faster)
  47.       - pll (permute last layer)
  48.         - take all pieces that are facing the correct direction in the last layer and move them to the right spot
  49.         - 21 algorithms (however, you've already learned two and that's all you need to complete.. the others will make you faster)
  50. - trivia
  51.   - current world record is 5.55 seconds, set this year in March
  52. - final steps: refine all the things
  53.   - mastered friedrich
  54.   - lubixcube.com (speed cubes w/ mods)
  55.   - new stickers from cubesmith.com
  56.   - bit.ly/gogaruco for silicone lubricant (for lubing the cube)
  57.   - speedstacks.com for competition timer
  58.   - speedsolving.com is a great community
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