How does League of Legends ranked MMR work in Season 13?

sportskeeda.com:

Riot Games' developers have shared comprehensive details regarding the League of Legends ranked MMR (Matchmaking Rating) system. Riot EvrMoar, Valorant's senior competitive designer, posted critical information regarding this matter in his Twitter thread.

Riot Auberaun retweeted the post, noting that the topic is highly relevant to League of Legends and urging the community to read it to better understand how Riot Games' MMR system works.

According to the thread, the developer does not match make an off-visible rank, but rather MMR (Matchmaking Rating). It has a performance range that the game creators refer to as Variance.

So, while one player may barely be out of placements and another maybe 50 games in, they will end up being placed together if their Variances have MMR overlapping.

According to Riot EvrMoar, this is critical since it might generate dissatisfaction when a player sees someone else's rank that is far higher than their own during a match. This may also happen if someone actively manipulates their rank, such as by throwing a game or boosting. For example, a bronze account appearing in higher ranks.

He went on to say that the team recognizes the difficulty of striking a balance and that they only want fair matches between players with higher MMR ranges. This is due to fewer games played and individuals with a significant number of games played. Most perceive matching with the visual rank differential in mind.

With Riot Games' desire to fix accounts, they must also avoid making it too easy for players to visually rank since this will enable boosting. If this occurs, a high-ranking player may wind up hopping on a lower-ranking profile and reaching the highest of levels in only a few games.

He also stated that if