I always considered him to be a colossal talent, one of the greatest in the whole history of chess. Each champion has had some sort of speciality, and his is creating counterplay in any position out of absolutely nowhere. He’s got an amazing ability to constantly stretch himself so that even in some kind of Exchange Slav he nevertheless manages to attack something and create something. He also plays absolutely brilliantly with knights, even better than Morozevich – if his knights start to jump around, particularly towards the king, then that’s that, it’s impossible to play against and they’ll just sweep away everything in their path. I noticed it’s better to get rid of them when you’re playing against him. In general, he’s improved a great deal in recent years, at some point after 2002. He’s a chess player of genius, but previously he didn’t work enough, by and large.

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via ChessBase.com