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Per Herbrich + Minka 'TrueSkill: A Bayesian Skill Rating System' (Microsoft Research 2007), TrueSkill represents each player's skill as which?
AA single integer like Elo with no spread
BA set of categorical rank tiers only used
CGaussian distribution with mean μ and stddev σ
DA timestamp of last played game only used
Answer & Solution
Correct answer: C. Gaussian distribution with mean μ and stddev σ
Herbrich + Minka NIPS 2007 + Microsoft Research TrueSkill site: skill = N(μ, σ²). Updates after each game via Bayesian message-passing on a factor graph.
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