Horizontal last slot (HLS)
Niche
Since the 2010s
Insert a last pair that goes in with R U R' (or its mirror) and orient the whole last layer: 432 cases.
Group
Source: Cubemuch, https://cubemuch.com/en/algs/3x3/hls/, retrieved 2026-10-29: case names and groups, and each case's algorithms: those credited to the community sheets it cites first, in its order, then those its search found, best-scored first (no votes or setups). Every algorithm shown was checked by the logic engine; rejected ones are listed in docs/db-exclusions.md.