Au, Tsz-ChiuThis report analyze the performance of the Derived Belief Strategy (DBS) in the 2005 Iterated Prisoner’s Dilemma Competition [1]. Our technique is to remove the participants from the computation of the average scores, as if they have never participated in the competition.en-USAn Analysis of Derived Belief Strategy’s Performance in the 2005 Iterated Prisoner’s Dilemma CompetitionTechnical Report