Pairwise Ranking and Elo Update
Pairwise Ranking and Elo Update
Zach Sekaran (UPenn), Haoran Zhang (Georgia Tech)
Georgia Tech REU Mentor Cheng Mao
24 July 2020
Zach Sekaran (UPenn), Haoran Zhang (Georgia TecPha)ir(wGiesoergRianTkeincgh aRnEdUElMo UenptdoartCe heng Mao)
24 July 2020 1 / 19
Outline
Application: Chess Ranking and Rating Problem Bradley-Terry Model and Elo Update Bounds for Error Algorithm for MLE Simulations
Zach Sekaran (UPenn), Haoran Zhang (Georgia TecPha)ir(wGiesoergRianTkeincgh aRnEdUElMo UenptdoartCe heng Mao)
24 July 2020 2 / 19
Application: Ranking Chess Players
Who's the best chess player in the world?
Zach Sekaran (UPenn), Haoran Zhang (Georgia TecPha)ir(wGiesoergRianTkeincgh aRnEdUElMo UenptdoartCe heng Mao)
24 July 2020 3 / 19
Application: Ranking Chess Players
Who's the best chess player in the world? Magnus Carlsen!
Zach Sekaran (UPenn), Haoran Zhang (Georgia TecPha)ir(wGiesoergRianTkeincgh aRnEdUElMo UenptdoartCe heng Mao)
24 July 2020 3 / 19
Application: Why Magnus?
Magnus doesn't lose often, beats opponents soundly, etc. But ranking the top 50 players can be much harder! Consider the following example:
Adversarial Example
Alice beats Bob, Bob beats Charlotte, Charlotte beats Alice. How do we know who's the best?
Zach Sekaran (UPenn), Haoran Zhang (Georgia TecPha)ir(wGiesoergRianTkeincgh aRnEdUElMo UenptdoartCe heng Mao)
24 July 2020 4 / 19
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