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The Nimzo-Indian Defence is a chess opening characterised by the moves: . 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4. Other move orders, such as 1.c4 e6 2.Nc3 Nf6 3.d4 Bb4, are also feasible. In the Encyclopaedia of Chess Openings, the Nimzo-Indian is classified as E20–E59.
Hypermodern openings include the Réti Opening, King's Indian Defence, Queen's Indian Defence, Nimzo-Indian Defence, Nimzowitsch Defence, Grünfeld Defence, Bogo-Indian Defence, Old Indian Defence, Catalan Opening, King's Indian Attack, Alekhine's Defence, Modern Defence, Pirc Defence, Larsen's Opening, and to a lesser degree the English Opening.
The Nimzo-Indian Defence is a popular defence to 1.d4, and in this case White has obtained a version with colours reversed and an extra tempo. The notes above give the three typical branches of the Nimzowitsch-Larsen Attack: (1) playing against an e5/d5 centre, (2) allowing ...e5 but contesting ...d5 and (3) playing against a d5/c5 centre.
Black often chooses the Queen's Indian when White avoids the Nimzo-Indian by playing 3.Nf3 instead of 3.Nc3. Black constructs a sound position that makes no positional concessions, although sometimes it is difficult for Black to obtain good winning chances. Karpov is a leading expert in this opening. Many Queen's Indian Defence players also ...
The Nimzowitsch Defence (named after Aron Nimzowitsch) is a somewhat uncommon chess opening characterised by the moves: . 1. e4 Nc6. This opening is an example of a hypermodern opening in which Black invites White to occupy the centre of the board at an early stage with pawns. [1]
The Taimanov Variation can refer to variations of four different chess openings, all named after Mark Taimanov: In the Sicilian Defense, 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6; In the Nimzo-Indian Defense, 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6; In the Modern Benoni, 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+
The Bogo-Indian Defence is named after the Russian-born German master Efim Bogoljubow who is believed to have originated the opening and played it regularly in the 1920s. . Subsequent prominent players to have adopted the Bogo-Indian include Aron Nimzowitsch, Paul Keres, Tigran Petrosian, Bent Larsen, Vasily Smyslov, Viktor Korchnoi, Ulf Andersson, Michael Adams and Nikita Vitiug
The Encyclopaedia of Chess Openings (ECO) is a reference work describing the state of opening theory in chess, originally published in five volumes from 1974 to 1979 by the Yugoslavian company Šahovski Informator (Chess Informant). It is currently undergoing its fifth edition.