CEOR-zero Tutorial (YruRU-d)

Apologies for all the vocal pauses. I was pretty much translating my thoughts from my first language into English while speaking, and it looks like I'll have to work on that. CEOR-zero or CEOR-0 is a method where the cube is "reduced" to be solvable using only [R, U] moves, with at most one z rotation in between. The "zero" is because the reduction is done in zero moves, by just cube rotations during inspection! YruRU-d is the method used to do this reduction. CEOR in general is a very new method with very few users, yet in this short span, the CEOR (not quite CEOR-zero, but almost the same) official OH WR Ao5 is 11.87s, which is already 280th in the world, and this ranking is getting better all the time. Here is a great tutorial on CP tracing using YruRU: https://www.youtube.com/watch?v=r2VGi8H0KxY Learning CP-tracing has a learning curve, and there are alternatives to YruRU. You can find help at the CEOR Discord server. Here is a permanent invite link: https://discord.gg/tDTu99f7dp Here is the YruRU website's advanced CP page: https://devagio.github.io/YruRU/CPLINE/advanced/adv.html Example solve scramble: D L' D2 F D2 B' R2 B D2 B F2 U' R B U2 R2 B2 D2 Example solve inspection: y' z // Placing DBL x2 y' // Placing Swap-Corner in DBR z // Converting LU to RU Example solve solution: u' R U2 R U2 R2 U R' U' z' // CPFB (9/9) R2 r U' r U' R2 U2 r U' r // EO-Stripe (10/19) R' U2 R U2 R2 U R' U' R U R U R // F2L (13/32) U' R' U' R U' R' U2 R2 U R' U R U2 R' U' // 2GLL (15/47) Overall tutorial summary: Inspection step 0: Identify a good first block to do. Inspection step 1: Rotate the cube such that the DBL corner (back corner of the FB) is placed in DBL (any orientation), such that the DFL corner does not end up in DFL. Inspection step 2: Identify the swap-corner by tracing CP, and rotate the cube using either x* or x2y* rotations to place it in DBR. Now the cube is solvable using [L, U] followed by [R, U] moves, without having to do a single move on the cube! In 25% of scrambles, for a given FB, the above will not work. These are called special cases and require 1 move to reduce the cube. Special case 1: If CP tracing gives the swap corner to be the DFL corner (i.e. inspection step 2 would have made the FB corner end up in DBR), then after inspection step 1 use a U* or R* move to place the DFL corner in UBL and then do x’ y2 to reduce the cube, or use a U* or R* move to place the DFL corner in DBR and then do a y’ to reduce the cube. Special case 2: If the inspection step 2 would have made the FB corner end up in DFR, then after inspection step 1, use a U* or R* move to place the swap corner in UBR, then choose to do either x or x2 y' such that the FB corner does not get stuck in DFR. 0:00 Basic overview 1:45 In-depth inspection example 5:51 In-depth solve example 8:05 Why it’s good 10:20 YruRU-d tutorial (inspection tutorial) 14:17 Special case 1 18:05 Special case 2 22:12 Outro