Psychologically, the choice of an appropriate opening is of the utmost importance for a player's success in a tournament.

In chess, there is only one mistake: over-estimation of your opponent. All else is either bad luck or weakness.

A game is always won through a mistake.

Seize the outpost K5 with your knight, and you can go to sleep. Checkmate will come by itself.

A Queen's sacrifice, even when fairly obvious, always rejoices the heart of the chess-lover.

Lasker thought that his rationalism rendered him immune from the surprises of chess theory.

Tactics is knowing what to do when there is something to do. Strategy is knowing what to do when there is nothing to do.