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.

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.

I don't make any secret of the fact that I'm closer to the Republicans than to the Democrats. But even under a President Hillary Clinton, US foreign policy toward Moscow would probably be more critical and confrontational. I hope it isn't too late for that.

Women, by their nature, are not exceptional chess players: they are not great fighters.

Vladimir Putin has this animalistic instinct of all dictators: He smells weakness. To quote Winston Churchill's definition of appeasement: "An appeaser is one who feeds a crocodile, hoping it will eat him last."

It was not about losing my mental power; it's about not feeling good about my contribution to the game.

Boris Nemtsov and I began to argue after Putin's return to the presidency in 2012. In my opinion, there was no longer a realistic chance to achieve regime change through peaceful political means, or real elections. Boris, on the other hand, never lost this hope. He felt that my assessment was premature and said: "You have to live a long time to see changes in Russia." He was deprived of that opportunity.