How do you cheat at chess?
Earpiece or vibration device to another person who’s playing as the opposing player, doing their move, and then relaying the ai’s respomse move back to the tournament player.
The same way that people will cheat at cards or any other game - preparation.
I sincerely believe that many people would benefit by putting the time spent perfecting cheating into the game, and have almost as good a result with no jail time.
In this case there have been rumors from signals from an audience member to vibrating beads ... save your sanity and don’t look it up.
Grandmasters have been busted before looking at cell phones in restrooms or catching outside signals. With the strength of modern computers it is relatively easy to find the “best” move and play it every so often.
Cheating doesn’t need to happen every turn, but just enough to keep you ahead of the other guy.
You have a confederate in the audience relay information from a chess program much stronger than any human player.
Also: Chess grandmaster accused of using iPhone to cheat during international tournament