Carlsen played 1.e4 then walked away from the board before his opponent sat down. The move itself was unremarkable. Carlsen's exit was the statement. He's protesting something. Whether it's time controls, the venue, or his opponent's preparation, Carlsen isn't saying. His body language screamed frustration. The tournament organizers will have to address this. Playing a move and abandoning the board violates basic etiquette. This isn't the first time Carlsen has shown disdain for a match's conditions. He expects better. He's telling everyone else to expect it too.