TrueSkill is a skill-based ranking system developed by Microsoft for use with video game matchmaking on Xbox Live. Unlike the popular Elo rating system, which was initially designed for chess, TrueSkill is designed to support games with more than two players.
Contents
Calculation
A player's skill is represented as a normal distribution
On Xbox Live, players start with
Factor graphs are used to "pack up" each team into
Player ranks are displayed as the conservative estimate of their skill,
The system can be used with arbitrary scales, but Microsoft uses a scale from 0 to 50 for Xbox Live. Hence, players start with a rank of
Use in other projects
TrueSkill is patented, and the name is trademarked, so therefore it is limited to Microsoft projects and commercial projects that obtain a license to use the algorithm.