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MimicBot: Combining Imitation and Reinforcement Learning to win in Bot Bowl

2021/08/21 by Nicola Pezzotti, Pezzotti, Nicola
Computer Science · #Artificial Intelligence (cs.AI) #FOS: Computer and information sciences #Generative Adversarial Networks and Image Synthesis #Human Pose and Action Recognition #Machine Learning (cs.LG) #Reinforcement Learning in Robotics #cs.AI #cs.LG

paper · pdf · doi:10.48550/arxiv.2108.09478

arxiv created 2021/08/21 · openalex publication_date 2021/08/21 · arxiv updated 2021/08/24 · openalex created_date 2021/08/30 · openalex updated_date 2026/07/28

Abstract

This paper describe an hybrid agent trained to play in Fantasy Football AI which participated in the Bot Bowl III competition. The agent, MimicBot, is implemented using a specifically designed deep policy network and trained using a combination of imitation and reinforcement learning. Previous attempts in using a reinforcement learning approach in such context failed for a number of reasons, e.g. due to the intrinsic randomness in the environment and the large and uneven number of actions available, with a curriculum learning approach failing to consistently beat a randomly paying agent. Currently no machine learning approach can beat a scripted bot which makes use of the domain knowledge on the game. Our solution, thanks to an imitation learning and a hybrid decision-making process, consistently beat such scripted agents. Moreover we shed lights on how to more efficiently train in a reinforcement learning setting while drastically increasing sample efficiency. MimicBot is the winner of the Bot Bowl III competition, and it is currently the state-of-the-art solution.

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