It was only a rapid event, but the reduced time control didn't prevent German GM Arkadij Naiditsch from finding a stunning tactical idea:
It's Black to move (the leadup was 16.Ng3-f5 Be6xf5 17.g4xf5), and it looks like White is in good shape. Black's rooks are doubled on the d-file, sure, but with pawns on c2 and d3 there's nothing for them to do. The bishop on g7 would be great for pressure on b2, but there's a pawn on e5 and it's well-protected. The queen is doesn't coordinate with anything on b6, while the knight is good on d5 but without a job to do. So what did Naiditsch come up with? (Try to solve it before reading the next sentence.)
I'll give the first move with the hat tip, and the next question, whose answer can be found here (along with the rest of the game), is how White should - or perhaps instead, shouldn't - respond.
(HT: Chess Today [17...c4])