Any opening starting with 1. d4 d5 in which white does not continue with c4 within the next few moves.
ECHESSPEDIA
Quotes of the Day
I think the players in this world championship are in different leagues. Karjakin is excellent—Carlsen is special.
Garry Kasparov 2016
I think that the World Champion should try to defend the quality of play more than anyone else!
Boris Spassky
Parapsychology? That’s a bunch of bananas. Korchnoi believes in that. He is still playing his game with the ghost of Geza Maroczy.
Nathan Divinsky 2004
Chess is a scientific game and its literature ought to be placed on the basis of the strictest truthfulness, which is the foundation of all scientific research.
W. Steinitz
” (about Lasker) For me, this personality, notwithstanding his fundamentally optimistic attitude, had a tragic note. The enormous mental resilience, without which no chess player can exist, was so much taken up by chess that he could never free his mind of this game, even when he was occupied by philosophical and humanitarian questions.”
Albert Einstein