I don't pretend to anything more than harmony.
You can't play chess if you're groggy from pills.
I have found after 1.d4 there are more opportunities for richer play.
The first great chess players, including the world champion, got by perfectly well without constant coaches.
Chess is a very tough game, and psychologically a tough game. And of course chess needs a lot of qualities, human qualities. And so you must have very strong nervous system and then you must be well prepared, you must be able to work a lot.
Playing black, I put great stake in the Ruy Lopez: I liked it, feel it, and understand it; in matches with Hjartarson and Timman it served me well. - on preparing for World Championship versus Garry Kasparov