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Sep 20th, 2013
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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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