A Remarkable New Idea in the Semi-Slav by FM Dennis Monokroussos
At the moment Levon Aronian and Magnus Carlsen are the hottest players in chess, and are unsurprisingly ranked #2 and #1 in the world, respectively. In this battle from the 2017 Norway Chess tournament, it is Aronian who came out on top, thanks largely to an ingenious idea for White in the Semi-Slav. On moves 11 and 12 Aronian sacs a pawn and then the exchange to draw Black’s queen offside, both to try to trap her but also to shut her and Black's queenside pieces away from the coming kingside attack. It's a great concept, and while the game wasn't perfect it was exciting and interesting from beginning to end.