Mahjong Notes

Riichi Mahjong AI In the world of mahjong AI, two stand out as the strongest. There is Naga, an efficient risk-taking machine, and Suphx, its risk-averse, yet highly aware counterpart. Of these two AI, Suphx is my favorite - its play is incredibly unique, regularly sacrificing tile efficiency to manage risk. Many mahjong players can find the most efficient discard in the majority of hands, but few can manage risk the way Suphx can. In this 3-part series of posts, I will be going over a variety of haipai , or opening hands, played by Suphx, and analyzing these decisions with Naga. By analyzing the decisions of these two AI, we'll take a close look at the tradeoff between efficiency, value, and risk in the early stages of a hand. I encourage readers to mentally choose the tile they would discard before scrolling down and looking at the AI decisions. Standard Order This hand is an example of the standard haipai order. In general, we cut guest winds, terminals, yakuhai, 2