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
A good sacrifice is one that is not necessarily sound but leaves your opponent dazed and confused.
Rudolf Spielmann
I believe motivation is one of the most important things one has to have after playing for many years. Chess is a very complete, well thought-out game, which is why people have been playing it since ancient times.
Judith Polgar
When I am in the USSR, I have the feeling that every tram conductor plays chess better than I do.
Hans Ree
First-class players lose to second-class players because second-class players sometimes play a first-class game
Siegbert Tarrasch
it would have been a debacle if Karjakin had become the 17th World Champion.
Garry Kasparov 2016