Much as the title. I'm wondering if there has ever been a tournament (would probably have been held online) where none of the players are aware of who they are playing?
Edit: There have been a lot of interesting answers given this evening. Thank you all. It seems there hasn't been a truly blind tournament in recent years.
Which leads me to wonder, how much of high level chess is prep Vs your opponent, versus your own skill?
Thank you all for keeping me thoughtful and engaged this evening. . . I'm 1400 on lichess if anyone wants a game. :)