The XBox 360 team was able to borrow the Microsoft Research team, in order to create the TrueSkill player ranking system.
It’s a more interesting problem than it seems. The gold standard for player ranking systems over the years has been the chess ranking system (the ELO system), which compares players and the opponents they defeat to rank them against each other. Beating up on newbies doesn’t help your ELO ranking if you’re high up – you have to play other high level players to improve. ELO is used by most 2 player game federations, including Chess and Scrabble. Continue reading
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