alt Hacker NewsSome (mostly American?) people know Mahjong as a solitaire game [1] that they likely have played on their phone or Windows PC/Mac.
This article is talking about the (arguably less known?) 4-player competitive game [2], and assumes you already know the difference (which some may not).
Probably it’s less popular in America, but it’s huge in Asia, so I doubt the solitaire version is more well known globally