I believe most definitely that one must not only grapple with the problems on the board, one must also make every effort to combat the thoughts and will of the opponent.
Mikhail TalBotvinnik's right! When he says such things, then he's right. Usually, I prefer not to study chess but to play it. For me chess is more an art than a science. It's been said that Alekhine and I played similar chess, except that he studied more. Yes, perhaps, but I have to say that he played, too.
Mikhail Tal