The depth of Tigran's approach to chess is the direct consequence of his clear mind and his rare insight into general aspects of chess, into subtleties of chess tactics and strategy. Petrosian performed a special kind of art in creating harmonious positions that were full of life, where apparent absence of superficial dynamism was compensated by enormous inner energy. Every subtle change in the position was always taken into consideration in the context of a complex strategy that was not obvious to his opponents.

Alekhine's attacks came suddenly, like destructive thunderstorms that erupted from a clear sky.

Chess is mental torture.

In conclusion, if you want to unravel the multitude of secrets of chess then don't begrudge the time.

What was the secret of Morphy's invincibility? I think it was a combination of a unique natural talent and brilliant erudition. His play was the next, more mature stage in the development of chess. Morphy had a well-developed feel for position, and therefore he can be confidently regarded as the first swallow - the prototype of the strong 20th century grandmaster.