...or my search-foo is not good enough to find it?
The game of go (https://en.wikipedia.org/wiki/Go_(game)) is becoming more and more popular in Western world nowadays, thanks to all the publicity Google and AlhpaGo brought to it. The topic is at least as deep and broad as chess, there are tens of millions of players in the world, professional tournaments with high money prizes, a lot of theory developed (think "chess" again) etc. It's clearly something that doesn't fit comfortable inside "board games" but rather a topic by itself.
Edit: answering to myself: there was one in beta, and it failed: http://area51.stackexchange.com/proposals/11942/game-of-go
However, it was 5 years ago. Since that time the popularity of go (in Western world; it seems to be important for stackexchange sites) grew enormously.