R Mahjong - Riichi Mahjong - is a Japanese-style mahjong game known as Riichi Mahjong. The game features a strong AI that can play at a stable level of 6th to 8th dan. Players can learn the game with hints from the AI, view detailed statistics of their games, play over a local network with a combination of people and bots, choose from multiple interface languages, and record their games for later playback. The game rules mostly adhere to the standard Japanese mahjong rules.