As a rule, so-called "positional" sacrifices are considered more difficult, and therefore more praise-worthy, than those which are based exclusively on an exact calculation of tactical possibilities.

Playing for complications is an extreme measure that a player should adopt only when he cannot find a clear and logical plan.

Young players expose themselves to grave risks when they blindly imitate the innovations of masters without themselves first checking all the details and consequences of these innovations.

For success I consider three factors are necessary: firstly, an awareness of my own strengths and weaknesses; secondly, an accurate understanding of my opponent's strengths and weaknesses; thirdly, a higher aim than momentary satisfaction. I see this aim as being scientific and artistic achievements, which place the game of chess on a par with other arts.

I study chess eight hours a day, on principle.

Chess, like other arts, must be practiced to be appreciated.

Chess is not only knowledge and logic