yes.
conversion rating ↔ rank: OGS has a new Glicko-2 based rating system! [2017] - #29 by anoek
Glicko is hard to summarise. It uses multiple games for rating adjustment (batches of 15 games or 1 month, whatever is less; a full batch is closed and a new batch starts).
glicko2 math: http://glicko.net/glicko/glicko2.pdf