NEW: The Vienna Variation - a reliable and ambitious weapon against 1.d4

The Vienna Variation is a particular and independent system of the Queen’s Gambit. It arises after 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 dxc4, when black’s capture on move 4 is strongly reminiscent of the Queen’s Gambit Accepted. But the Vienna Variation is also inspired by Nimzo-Indian structures while keeping its own character. The main variations usually lead to asymmetrical pawn structures, where Black can hope to get a fighting game.

In the second installment of 'Repertoire for Black against 1.d4', GM Kuljasevic suggests an opening repertoire against 3.Nf3 based on the Ragozin

1.d4 Nf6 2.c4 e6 3.Nf3 d5 - Ragozin and Queen's Gambit with 4a6 for Black

Every First Move For Black (Against d4), Tiered and Ranked

Magnus Carlsen's Secret Weapon Against d4! - 👑's Gambit Declined

Secret Weapon in the Vienna Variation of the Queen's Gambit

TheLastStyleBender's Blog • The Opening Anthology •

Best Chess Openings for Black against d4 - Remote Chess Academy

Opening Theory Archives - British Chess News

The Modern Benoni - Schachversand Niggemann

What does it mean for a chess opening to be 'dubious'? - Quora