Any experienced player knows how a change in the character of the play influences your psychological mood.

We shouldn't forget that in the case of Georgia, a problem was done away with that bothered [Vladimir] Putin personally - that is, the security during the Winter Olympics in Sochi in 2014. Security not in the sense of a guaranteed absence of a terror attack, but in pursuing the aim of moving hot spots of possible conflict farther from the site of the Olympic Games, which are to be held a stone's throw from Abkhazia - that is, in de jure Georgia.

Many Republicans who traditionally were for a positive role in the world, anti-Russian, now they want to defend their party and leader, and they don't care about real arguments. The paradox is the Democrats were so timid in criticising Vladimir Putin. Barack Obama appeased him and now they are criticising Putin's interference in American democracy. It is a strange reversal of the roles.

The ability to work hard for days on end without losing focus is a talent. The ability to keep absorbing new information after many hours of study is a talent.

A grandmaster needs to retain thousands of games in his head, for games are to him what the words of their mother tongue are to ordinary people, or notes or scores to musicians.

Many so-called pragmatists want nothing to do with space exploration or other kinds of ambitious endeavours that don't have a clear payoff. This mentality is hugely damaging to our success as a civilization. Our desire to understand the universe is kindled by curiosity and wonder, and this has fuelled countless scientific breakthroughs.

Dictatorships can exist with free markets - not that China is really a free market - especially in poor countries where the regime insists that it's a choice between food and liberty, a false choice. But increasing affluence will inevitably result in political pressure.