The sanctions and travel restrictions would have to be far more comprehensive to be truly painful for [Vladimir] Putin and his inner circle. And the new middle class should also feel the effects of what he is doing. For instance, we should ask those who wish to enter the EU whether they have visited illegally occupied Crimea in the last few months and, if the answer is "yes," deny them a visa.

Alexei Navalny, the opposition politician who has led anti-corruption protests, had a blog about a credit line to a company owned by Vladimir Putin's son-in-law, $1.75 billion from Russian state funds; this is one transaction. Putin controls more money directly and indirectly than any individual in human history.

Dictatorships sometimes fall unexpectedly and quickly. And [Vladimir] Putin knows that for him, the loss of power doesn't mean a comfortable retirement, but something completely different.

There are many ways of showing your protest and discontent without the actions of Kremlin.

[Romans] never made any improvements on the cavalry. And amazingly, when you read the sources, they couldn't make it because stirrups were not known in Europe. For hundreds of years, the Romans couldn't make a cavalry which proved to be extremely effective.

We don't have a choice. A united democratic Eurasian continent welded together by common economic interests is our only hope and contribution to stability in the world. If we fail, I fear that Russia in its present form is in for the most serious of upheavals - the outcome of which is extremely unpredictable.

Botvinnik tried to take the mystery out of Chess, always relating it to situations in ordinary life. He used to call chess a typical inexact problem similar to those which people are always having to solve in everyday life.