Skat is Germany’s national card game played by millions of players around the world. In this paper, we present the world’s first computer skat player that plays at the level of human experts. This performance is achieved by improving state evaluations using game data produced by human players and by using these state evaluations to perform inference on the unobserved hands of opposing players. Our results demonstrate the gains from adding inference to an imperfect information game player and show that training on data from average human players can result in expert-level playing strength.

Authors

• Michael Buro
• Jeffrey R. Long
• Timothy Furtak University of Alberta
• Nathan Sturtevant

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