We have again a strange gap. We have the big scientific discoveries around the second, third century BC. Then we have an invention of the so-called Arab system, the positional system of counting with zero dated to the eighth or ninth century.

To my surprise I found that when other top players in the precomputer age (before 1995, roughly) wrote about games in magazines and newspaper columns, they often made more mistakes in their annotations than the players had made at the board.

Chess is a unique cognitive nexus, a place where art and science come together in the human mind and are then refined and improved by experience.

My life is split in three parts; I don't know the percentage. One could be called "chess" - the Kasparov Chess Foundation, promoting the game, training young players, playing on the internet, sometimes exhibitions. The second area would be "writing" - books, articles, Twitter, Facebook. And then "political activity" - fighting for human rights and democracy, so TV, interviews, speeches.

[Vladimir] Putin intended to provide for a broad safety corridor [for the Olympic Games]. That's why Abkhazia was a more important and desired goal of Russian aggression against Georgia than South Ossetia, which merely served as a pretext. Concerns mainly centered on the Crimea.

I am between the Tories and the Lib Dems. I am fiscally conservative. I'm for strong foreign policy, but socially very liberal. I am not religious. That makes me feel uncomfortable with American Republicans. I don't feel at home anywhere, really. Labour under Tony Blair was not something I would associate myself with, but I didn't have a big problem with it. I have to make a choice between fiscal and the role of the state and social freedom.

All that now seems to stand between Nigel and the prospect of the world crown is the unfortunate fact that fate brought him into this world only two years after Kasparov.