{"id":169873,"date":"2005-11-18T07:02:09","date_gmt":"2005-11-18T15:02:09","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/project\/trueskill-ranking-system\/"},"modified":"2024-06-20T05:32:08","modified_gmt":"2024-06-20T12:32:08","slug":"trueskill-ranking-system","status":"publish","type":"msr-project","link":"https:\/\/www.microsoft.com\/en-us\/research\/project\/trueskill-ranking-system\/","title":{"rendered":"TrueSkill\u2122 Ranking System"},"content":{"rendered":"

\"XboxThe TrueSkill ranking system is a skill based ranking system for\u00a0Xbox Live (opens in new tab)<\/span><\/a> developed at Microsoft Research (opens in new tab)<\/span><\/a>. The purpose of a ranking system is to both identify and track the skills of gamers in a game (mode) in order to be able to match them into competitive matches. TrueSkill has been used to rank and match players in many different games, from Halo 3 to Forza Motorsport 7 (opens in new tab)<\/span><\/a>.<\/p>\n

An improved version of the TrueSkill ranking system, named TrueSkill 2 (opens in new tab)<\/span><\/a>, launched with Gears of War 4 and was later incorporated into Halo 5, Gears 5, Halo Infinite, and Forza Motorsport.<\/p>\n

The classic TrueSkill ranking system only uses the final standings of all teams in a match in order to update the skill estimates (ranks) of all players in the match. The TrueSkill 2 ranking system also uses the individual scores of players in order to weight the contribution of each player to each team. As a result, TrueSkill 2 is much faster at figuring out the skill of a new player.<\/p>\n

Ranking Players<\/h1>\n

So, what is so special about the TrueSkill ranking system? Compared to the Elo rating system (opens in new tab)<\/span><\/a>, the biggest difference is that in the TrueSkill ranking system skill is characterized by two <\/b>numbers:<\/p>\n