The FangShi 3x3x3 Mixup Cube (Black) is a unique challenge since, despite appearances, it is more like a standard 3x3 cube. The model's trick is that, despite the center not being in place yet, its sides may be rotated. This increases the range of potential moves on the cube and makes it feasible to create challenging scenarios that are not achievable on a standard 3x3. If you understand the traditional 3x3 cube well, FangShi 3x3 Mixup is a fun challenge.