Chess960
In 2003 Aronian won the Finet Chess960 open at Mainz; this qualified him for a match against Chess960 World Champion Peter Svidler at Mainz the following year, a match which he lost 4½–3½. He won the Finet Chess960 open tournament again in 2005 which earned him a rematch with Svidler in 2006, and won the match this time 5–3 to become Chess960 World Champion.
In 2007 he successfully defended his title of Chess960 World Champion by beating Viswanathan Anand. He lost the title in 2009 to Hikaru Nakamura.
Read more about this topic: Levon Aronian