Arena Matchmaking System Explained

Finally, an explanation of the new arena match making system has arrived.

We recently introduced a new Arena matchmaking system with the intent of better matching up players against opponents of similar skill level, and to address potential abuses under the old system. We realize that many players have questions regarding the new system, and as such, we would like to provide more insight into the new matchmaking system.

• First and foremost, the primary goal of the new Arena matchmaking system is to match players against opponents of similar skill, regardless of your or your opponents’ team rating. This means that once an estimated skill level is determined, you will more likely be matched against other players of a similar skill level. Please note that the estimated skill level is constantly being evaluated and will adjust based on each team’s continual performance. Ratings that are won or lost also take into account skill level, so that you will not suffer a high penalty if you lose against a team that is much better than their actual team rating.

• Another important aspect of this new Arena matchmaking system is a smaller range of maximum rating that can be won or lost. Because of the differences between how the new system assigns rating points at the end of a match, we are still tweaking rating gain versus loss per match to improve the experience.

• If you were previously ranked with a high skill level and decide to create a new team, it should now be much easier to reach your team’s correct rating. This ensures that players will not feel penalized for moving between teams, and high ranked teams will not feel penalized for trying out new players without much risk to the team rating itself.

• Finally, the core and fundamental reason for the new Arena matchmaking system is for players to participate in Arena games that are fun. We feel that with this new system, higher ranked players will most likely find the challenges that they seek, newer players will no longer feel that Arenas are closed to them, and players will not feel as penalized for trying new things in the Arenas.

We like the way that matchmaking works in the new system and feel that it is working as expected. However, we acknowledge that there are some aspects of the way rating is calculated under the new system that could use some tweaking. As with all things, your enjoyment of the game and its systems are very important us, and this system was implemented in an effort to further promote the enjoyment of the Arenas. As always, we welcome your feedback and would constantly be striving to make this system even better.

Source: blizzard

Update #1:

Additional explanations added.

• Team rating: Team rating is the primary measure of a team’s skill during the course of its existence. Titles and arena points are based on team rating.
• Personal rating: Personal rating only exists to ensure that a player has participated enough on a team to deserve the benefits of being on that team. When personal rating gets close enough to team rating, we judge it is likely the player deserves the benefits of the team.
• Matchmaking rating: This rating exists to ensure quality match-making despite players changing teams. In addition, the theoretical mathematical foundations of the new matchmaking system allows this rating to adapt much faster than team rating and personal rating, making the entire system more correct. In our measurements to date, this rating has been quite precise in predicting the outcomes of future matches.
• The matchmaking rating is separate for each bracket, and the matchmaking ratings do not interact between brackets in any way.
• Each bracket has a seperate matchmaking rating.
• Team rating currently converges towards the average of the matchmaking ratings on the team. Personal rating currently converges towards each individual’s matchmaking rating. As such, the team rating currently ends up in the middle of the personal ratings of each member of the team, usually around the average personal rating of the team. As mentioned above, we will be adjusting this to keep personal ratings in line with team ratings.

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