What is MMR? (Matchmaking Rating))

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Loote

Oceanic Project Manager

Follow Loote on Twitter

09-07-13
1 of 1 Riot Posts

League of Legends uses a mathematical system to match up players of similar skill in the “Normal” and “Ranked” game types. Each player is assigned a number that represents his relative skill level, which is determined by the outcomes of his previous games. When a player enters the queue for these game types, the system determines his relative skill level. This number is called a Matchmaking Rating (MMR). The system then attempts to assemble two teams based upon the MMR of all players in an attempt to create a game wherein both teams have as close to a 50% chance of winning as possible. The system accounts for the advantage of pre-made teams by providing more difficult non-premade opponents, or another pre-made team.

We use a modified version of the Elo system. Generally speaking, the Elo system mathematically compares two player ratings to predict what a player’s chances are of winning a game against another player. If a player wins, his rating goes up; if he loses, it goes down. If the system expects a player to lose a particular match, his rating will go up more based on how poor his odds were. Additionally, the ratings of newer players fluctuate more rapidly so that they reach an accurate skill level faster. This means that good players become highly rated because they consistently win more often than the system expects, until the system is correctly predicting when they will win.

We modified the Elo system to adopt a team MMR based on whomever is on the team, and when a team wins, it’s assumed that everyone on the team was “better” than the guess, and each player on it gains points.

We use various proprietary methods to identify new players who are significantly more skilled than a typical new player, and they receive an Elo bonus.

Gaining summoner levels significantly boosts the MMR.


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joldeon

Junior Member

09-07-13

fird


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Yep

Junior Member

09-07-13

secoth


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Playss

Member

09-07-13

3rd, Half life 3 confirmed


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Lukeplop

Senior Member

09-07-13

ferph


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Jacky

Junior Member

09-07-13

Makes much more sense now, thanks again Loote.


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BladesEverywhere

Junior Member

09-07-13

ferst


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chopragunner

Member

09-07-13

Is your MMR affected by playing normal games?


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Adamantinos

Junior Member

09-07-13

Quote:
Originally Posted by chopragunner View Post
Is your MMR affected by playing normal games?
You have a Normals MMR and a Ranked MMR, they don't affect each other, that's why you need to play 10 provisionals the first time you play ranked


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Vendetta1903

Member

09-07-13

thks for the info, now i c