Any opening starting with 1. d4 d5 in which white does not continue with c4 within the next few moves.
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Quotes of the Day
Man has no chance to win against the modern computer. And, by and large, a confrontation between two individuals is more interesting.
Vladimir Kramnik 2015
We will note the openings used by the participants of a nine-round match. The age of openings is considerably higher than the age of both rivals. Some opening positions could be analyzed by Steinitz when he was preparing to his match with Zukertort.
Mikhail Tal 1966 (Petrosian-Spassky match)
Carlsen: “I ran out of steam towards the end but fortunately I played better than he did”
Magnus Carlsen 2017
Good players actually use their long-term memory much more than inexperienced players, who use their short-term memory. Good players try to recall patterns.
Magnus Carlsen 2016 2016
Everything is very concrete nowadays. The computer often gives unnatural moves which are correct, but sometimes hard to remember. You know a line is correct, but then your forget something and lose terribly.
Daniel Stellwagen 2010