Nowadays, when you're not a grandmaster at 14, you can forget about it

Before a game, I avoid having a heavy meal so that I don't feel sleepy at the board. You eat to be healthy, and that generally takes care of everything. Also, you can't be too finicky, since at tournaments you tend to eat at restaurants here and there. But, as long as you're eating sensibly, it's all good.

I attend to my fitness. I go the gym every day and try to maintain my physical fitness; without that, it is tough to take challenges on the chess board.

I don't know how many calories an average chess player burns per game, but it often exceeds that of a player in ball games. It is not only the chess as such: You need to be fit and undergo complicated preparation.

Being the undisputed world champion is a relief. We instituted a unified chess title, I am the absolute world champion.

There are some aspects of work you need to keep working on and no matter what environment you are in. Continuous learning is very important. It's what I call 'competitive tension', which is about having a competition around.

Carlsen will be ridiculously difficult to play against. (on the 2013 World Championship match)