Mahjong and artificial intelligence
Mahjong is a relatively complex four-player game with multiple variants played all around the world. When developing a mahjong-related artificial intelligence (AI), there are several factors researchers must consider; an AI must take into account its own hand as well as what it infers about the other players' hands utilizing the information available.
Source: Wikipedia — Mahjong and artificial intelligence (CC BY-SA 4.0)