Recent changes
Autofill and premade parity
In a recent dev blog, Cody “Riot Codebear” Germain, Product Lead for Competitive Gameplay on League of Legends, talked about ranked matchmaking and explained their goal: “improve queue matchmaking quality without compromising queue time and availability.”
Autofill Parity: In 10.6 we shipped Autofill Parity, which aims to equalize the number of autofills across teams. Since then, autofill imbalance has gone from 11.4% of all ranked solo/duo games to less than 5%, with almost no impact to queue times.
Premade Parity: Similar to Autofill Parity, Premade Parity strives to make matches with an equal number of premades on each side. We activated this feature in 10.7, and since then we’ve gone from 54% of premade matches having imbalanced premades to 6%, with little to no impact on queue times depending on skill level.
New matchmaking algorithm
The new matchmaking algorithm (check out the explanation below, in May 2020) replaced the old system in patch 10.10, however, currently it is limited to normal queues.
The developers confirmed that the new system is showing improvements in most regions, and it will find its way to ranked queues in the next preseason, as they want to avoid a major impact to ranked MMR during the current season.
July 2020
