It didn't take long to recognise the shortcomings of the Soviet regime and to see the values of the free world.

Inevitably the machines must win, but there is still a long way to go before a human on his or her best day is unable to defeat the best computer.

There is a good chance Donald Trump won't survive four years. Conflict of interest is the biggest danger for Trump. He is destroying one of the pillars of the free world. He is seeking to eliminate the very concept of conflict of interest. A lot of things in America were built on a code of honour. I am confident the damage done by ruling through family and friends will be made impossible by future regulation.

Putin can't afford to leave the office because he will be in real danger of being prosecuted for things he and his people did during their stay in power.

The legend of the best player of chess has been destroyed.

When I was preparing for one term's work in the Botvinnik school I had to spend a lot of time on king and pawn endings. So when I came to a tricky position in my own games I knew the winning method.

You're always going to have dangerous, disaffected people in any society, and some will be violent. Increasing prosperity and reducing inequality won't solve that completely. But having big, positive dreams and a society that makes it possible to achieve those dreams is what we must strive for.