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  • Hello guys its me CriticalCubing and today I am making an in-depth video on the LSE step of Roux method

  • LSE is the last step of Roux method, its the 4th step in which you solve the last six remaining edges, hence LSE

  • 4 edges are on the top, and 2 on bottom, hence 6 edges. LSE can be broken down into 3 mini steps

  • First step, is 4a and you solve Edge Orientation

  • Here you make all the sticker on top and bottom, either white or yellow

  • In this case, I have green and red so I switch them up and make all stickers white/yellow

  • Next step is solving UL/UR edges which is solving the right side of the cube, and the left side

  • In this step, you solve the edge that comes in here and the edge that comes in here

  • For solving this step, you keep both the edge in bottom

  • and then you just put them on the top like this

  • and then you solve this side and this side

  • The last step is called 4c in which only the middle slice is left to be solved

  • and you solve the middle slice by doing one alg like this

  • Those are the 3 steps of LSE

  • 4a is solving edge orientation EO. 4b is solving UL/UR edges and 4c is solving the rest

  • Now we are going to get indepth into these steps

  • First step of LSE is called edge orientation and in this step you get all the edges to be either white or yellow

  • and in this step, we are introduced to the concept of bad edges and good edges. Good edges are edges which already have white/yellow on top like this one

  • and bad edges are those edges that do not have white/yellow on top. Red is bad edge, green is bad edge, blue is bad and this is good edge

  • And the most important case of EO is called Arrow case. In arrow case you have 3 bad edges on top

  • and one bad edge will be in the bottom

  • Now if you have yellow or white facing towards you in the bottom piece, that means its a bad edge

  • otherwise if you have any other sticker like green/red that means, its a good edge

  • This is the arrow case, 3 on top and one on bottom and for solving this when the edge is in the front

  • you do M' and then you do U or U' and you do M' once more

  • and this is the next arrow case and this is from the back and one important thing to remember when recognizing bad edges and good edges

  • is that bad edges will always come in pairs, so there will never be odd number like 1/3/5 and they will always be even 2/4/6

  • For example, I see 3 bad edges on top and this is not a bad edge. Because bad edges always come in pairs

  • the last bad edge is at the back as 3+1 is even no and bad edges always come in pairs

  • and for solving the arrow case with edge at the back, you do M U or U' and then M'

  • Now we are going to go over each of the EO cases and first I'll show you the beginner cases and then more intermediate ones

  • First we are going to start with 2 flips and this is the first case and in this case you have 1 in here

  • and one in here, and this can be either vertical like this or horizontal like this

  • and for solving this 2 flip case, you do M' U' M

  • for getting the arrow and you can solve the arrow by doing M' U' M' or M move

  • Now the same 2 flip case can be in the bottom and for solving the case when its in the bottom, you do this

  • M' U' M' which gives us the arrow case and then you can solve the arrow

  • This is the next 2 flip case and you have both of the edges adjacent to each other

  • and when you have these two in this position, at the back and the right, you do this

  • M' U' M' which brings us the arrow case and then you just solve the arrow case

  • this is the same 2 flip case as before but now you have the edges in right and front

  • and you can always do U' and solve from here, but if you want to be even more efficient, you can solve it from here too

  • but doing M U M which brings us arrow case and then you solve the arrow case

  • this is the same 2 flip case from U2 angle and for solving this you do M U' M'

  • which gives you arrow from back and then you solve arrow case

  • and this is the same case from U' angle and for solving this you do M' U M

  • which gives you arrow case from front, and you solve arrow

  • do remember one thing, arrow cases from front start with M' move and then you can do U' or U move

  • and then you can either do M or M'. Only the first M' move matters, after that you can do U, U', M, M' and the EO will still be solved

  • same goes for the arrow cases from the back. Only the starting M move matters

  • then you can do U, U', M', M and the EO will still be solved

  • this is the last 2 flip case and you have 2 edges like this

  • one on the top and one on the bottom, and when you have the case like diagonally opposite from each other, you do this

  • M U' M which gives you arrow and then you solve the arrow case

  • and you can get the case like this and this is just the mirror case. Instead of using M moves, you use M' moves

  • For solving this case, you do M' U' M' which gives arrow case and then you solve arrow

  • Now sometimes you may get cases like this where you have edge on the side, instead of being on the top

  • and in these type of cases, instead of doing U and solving it, you can solve it from here too saving 1 move

  • the thing that you have to do is insert the edge, where the good edge is

  • In this case, I have the bad edge at the back, so I insert the edge in here with M' U M

  • and that will give me the arrow case from the back so I can just solve arrow cased

  • and when you get the case like this with the bad edge in front, you insert the edge at the back with M U M'

  • and that will give you the arrow case from front and you can solve the arrow case

  • Now comes the 4 flip case and in this case, you have 2 bad edges on the top, and 2 on the bottom

  • and for solving this case, you keep the bad edges on the top in horizontal line and these will be vertical

  • and for solving this you do M' U2 M'

  • That will give you the arrow case and you can solve the arrow case

  • This is the next 4 flip case and in this case you have all the 4 edges on top like this

  • and for solving this case you do M' U2 M' and then you solve the arrow case

  • This is the last 4 flip case and here you have 2 bad edges on the top and they are adjacent

  • and 2 will be at the bottom and for solving this, you keep the bad edges anywhere you want

  • Keep the bad edges anywhere and do M2 and then solve arrow case

  • for example, I can keep this in here and do M2 and I get the arrow case

  • and then I can just solve arrow case for solving this EO case

Hello guys its me CriticalCubing and today I am making an in-depth video on the LSE step of Roux method

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ルックスメソッドLSE (Last Six Edges) コンプリートガイド|チュートリアル (ROUX METHOD LSE (Last Six Edges) COMPLETE GUIDE | TUTORIAL)

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    邱頌傑 に公開 2021 年 01 月 14 日
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