# GBC

 GBC method Information about the method Proposer(s): Signalcuber Proposed: 2022 Alt Names: Variants: No. Steps: 3 (COOpposite, Unmixing, PBL) No. Algs: Total:9 (OOpposite: 3, Unmixing: 2, PBL: 5) Avg Moves: Purpose(s): Speedsolving

GBC (or Good Bad Corners) is a 2x2 speedsolving method using COOpposite and PBL.

However the method is the same as Guimond Method with it just reduced the cases for first to step by orient entire face then OLL instead of orient 3 corners on D layer then solve rest of the orientation using 1 algorithm.

## COOpposite

You can see if a corner is good or bad by looking at the bottom and top stickers. The key sticker is yellow/white. Example : if 2 bottom stickers have white or yellow, they are good. If they have any other colors, they are bad. To fix the bad corners, we will use Sexy Move or Reverse Sexy. For the top ones, just use normal OLL.

## Unmixing

The Unmixing part is probably the easiest part of the method.

• Sometimes, you will get an L-shape

. If you get this case, put the odd corners on URF and DRF and do this algorithm : R2 U R2 U R2 U2 R2.

• If you have two yellow corners that are not adjacent on the top and a yellow corner bar on the bottom

, put a yellow corner of the top on the URF spot and the bottom yellow corner bar at the right, do : R2 U' R2 U' R2.

• If you have the same case as case 2 but with the bar on top

, put a bottom yellow corner on the DRF spot and the top yellow bar at the left, and do R2.

• If you have two non-adjacent yellow corners on both top and bottom

, put a yellow top corner at the URF spot and a yellow bottom corner at the DRF spot, and do R2 U' D' R2.

• If you have yellow corner bars on both top and bottom, put the top one at the left and the bottom one at the right, then do R2.
• If you have the first case but yellow is inversed with white,

put the yellow top corner on the ULF spot and the bottom white corner on the DLB spot, and do R2. You will end up in the first case.

## PBL

It's just normal PBL.