WTF was that?

Last night I couldn’t believe my eyes when Caruana blitzed out a complete lemmon in a known theoretical position. The move seems to drop the exchange for nothing, so you at the position and try to find his idea. You look and look and look and see nothing. So you switch on the engine and it cannot see anything either. The real shocker though is that Carlsen believed him. Chess isn’t Poker. In chess your cards are always face up. If this was a bluff, it was the worst bluff in chess history. Even worse, Carlsen still won.

By the way, the reaction by Vidit when Caruana played that move is just priceless.