Magnus Carlsen vs. Hans Niemann
After the game Magnus accused Hans for cheating. He thought he wasn't playing a human, he thought he was playing a computer.
After the game Hans Niemann was caught cheating on chess.com but he wasn't caught cheating over the board. Some people say that he was using a ear piece or a thing to signal the right move. Chess.com had the best anti-cheating system and they used it to see if Hans was cheating but he was not and Hans sued anyone that has accused him of cheating of a price of $100,000.