Chess 960 (1:12) 'Chess Club and Scholastic Center of Saint Louis'
At one point Aronian says,
The objective of [chess960] is the same as in the game of chess, although it's trickier because, unlike chess, your pieces are not really coming fast into the game. You can't just use your pattern recognition and say, 'Oh, this is good for me', because the pieces are randomly placed.
For more about the match, see Chess960 'Showdown' in St.Louis.