Few things are as psychologically brutal as chess.

Nervous energy is the ammunition we take into any mental battle. If you don't have enough of it, your concentration will fade. If you have a surplus, the results will explode.

The highest Art of the Chess player lies in not allowing your Opponent to show you what he can do.

Vladimir Putin is the wealthiest man on the planet, for sure. But this is different to the wealth of a Bill Gates or a Warren Buffett, a Carlos Slim or a Sergey Brin. They stay wealthy whether it is Barack Obama or Donald Trump in power. Putin's wealth depends on him staying in power. It is all about controlling the budget, the hard currency reserves and keeping under his thumb the oligarchs who cannot move their money without his permission. It is something close to a trillion dollars that he can control and move.

Though I would have liked my chances in a rematch in 1998 if I were better prepared, it was clear then that computer superiority over humans in chess had always been just a matter of time.

I started playing chess when I was five years old. I learned the moves from my mother, then worked with my father - and later trainers. My style became very technical. I sacrificed a lot of things. I was always hunting for the king, for the mate. I'd forget about my other pieces.

When your house is on fire, you cant be bothered with the neighbors. Or, as we say in Chess, if your King is under attack you don't worry about losing a Pawn on the Queen's side