Automated matchmaking (AMM) is a StarCraft II battle.net feature, similar to the one in Warcraft III.
Players play 5 qualifying matches and are then assigned a skill level, which determines the league and division they will be placed in.[1]
Skill levels will be reevaluated over time.[2]
Players are placed into separate brackets for 1 vs 1 and team matches[3] and teams can participate in anonymous matchmaking.[4]
There is a ladder within each skill league.[5]
Players do not directly select which map they play on. Instead, they may vote against three "unpreferred maps" out of a list, and are less likely to play on said map, but are not guaranteed to do so.
Winning a match grants points which can eventually lead to a rating change. When two players are about to face off, each is given a "favored" rating, which determines how many points each will get for defeating the other.
The AMM helps control smurfing, along with players only being allowed one account per purchase of StarCraft II.[6]
Changing Percentages[]
As of April 2012, season 7, Blizzard experimented with "loosening" up the AMM, causing players to be pitted against others with slightly higher and slightly lower ratings.[7]
The immediate result was a failure, as players at both the extreme upper and lower skill ranges were being matched with inappropriate opponents. Blizzard introduced changes to correct the situation. At the higher skill levels, the system now chooses more competitive matches over faster matchmaking.[8]
As of Heart of the Swarm, Blizzard changed the league percentages as follows: Bronze 8%, Silver 20%, Gold 32%, from the previous 20% each.[9]
External Links[]
Warcraft III Automatic Matchmaking. Battle.net. Accessed 2009-11-07. (Explanation for AMM in Warcraft III)
References[]
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