[zeestephen]

The game that Carlsen lost was live.

The Chess Federation has a very rigorous protocol to prevent electronic cheating or spectator-assisted cheating in live tournaments.

Almost everyone who thinks Niemann cheated in the first game believes that a computer hack or a betrayal by someone on Carlsen's prep team was involved.

I have wondered if there is Internet or Crypto betting on chess matches?

Carlsen playing white against the weakest player in the tournament would have a huge pay off if Carlsen lost.

[Mr. Jeeves]

...or a betrayal by someone on Carlsen's prep team was involved.

If the latter, that's why Carlsen left the tournament. No point in playing on if your own team has been compromised by gambling money - have to clean up the mess, first.