Queen's Knight Defence
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The Queen's Knight Defense (also known as the Nimzowitsch Queen Pawn Defense, Bogoljubov–Mikenas Defense, or Lundin Defense) is a
chess opening The opening is the initial stage of a chess game. It usually consists of established Chess_theory#Opening_theory, theory. The other phases are the chess middlegame, middlegame and the chess endgame, endgame. Many opening sequences, known as ''op ...
defined by the moves: : 1. d4 Nc6 Unless the game transposes to another opening, the ''
Encyclopedia of Chess Openings 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 Å ahovski Informator (Chess Informant). It ...
'' code for the Queen's Knight Defense is A40.


Discussion

This opening was tried by some hypermodern players such as
Aron Nimzowitsch Aron Nimzowitsch (; , ''Aron Isayevich Nimtsovich''; 7 November 1886 â€“ 16 March 1935) was a Latvian-born Danish chess player and writer. In the late 1920s, Nimzowitsch was one of the best chess players in the world. He was the foremost f ...
and
Efim Bogoljubov Efim Bogoljubow, also known as Efim Dimitrijewitsch Bogoljubow (April 14, 1889 â€“ June 18, 1952), was a Russian-born German Grandmaster (chess), chess grandmaster. Early career Bogoljubow learned how to play chess at 15 years old, and dev ...
, but it has never become very popular. The move 1...Nc6 is a fairly committal move which blocks Black's c-pawn; usually Black delays playing it until White's setup is clear. Most games featuring 1.d4 Nc6
transpose In linear algebra, the transpose of a Matrix (mathematics), matrix is an operator which flips a matrix over its diagonal; that is, it switches the row and column indices of the matrix by producing another matrix, often denoted by (among other ...
to other openings. After 2.e4 the
Nimzowitsch Defense 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 of the board ...
arises. After 2.Nf3 d5 a variation of the
Queen's Pawn Game The Queen's Pawn Game is any chess opening starting with the move: : 1. d4 It is the second-most popular opening move after 1.e4 (King's Pawn Game). Terminology The term "Queen's Pawn Game" is usually used to describe openings beginning wit ...
is possible. After 2.c4 d5 the opening is a
Chigorin Defense The Chigorin Defense is a chess opening named for 19th-century Russian master Mikhail Chigorin. An uncommonly played defense to the Queen's Gambit, it begins with the following moves: :1. d4 d5 :2. c4 Nc6 The Chigorin Defense violates seve ...
. There are some lines that are unique to 1.d4 Nc6, most importantly 2.d5 which chases the knight away, usually to e5. The opening resembles an
Alekhine's Defence Alekhine's Defence is a chess opening that begins with the moves: :1. e4 Nf6 Black tempts White's pawns forward to form a broad , with plans to undermine and attack the white structure later in the spirit of hypermodern defence. White's imposi ...
but on the opposite side of the board. In an
opening book A chess opening book is a book on chess openings. This is by far the most common type of literature on chess. These books describe many major lines, like the Sicilian Defence, Ruy Lopez, and Queen's Gambit, as well as many minor variations of the ...
by Sid Pickard, this variation was called the Bozo-Indian Defense ("Bozo" being a combination of the prefixes "Nimzo" and "Bogo"). The Queen's Knight Defense was featured (although not mentioned by name) in the season four episode of ''Chuck'' entitled "
Chuck Versus the Family Volkoff "Chuck Versus the Family Volkoff" is the 20th episode of the fourth season of ''Chuck'', and the 74th overall episode of the series. The episode was directed by Robert Duncan McNeill and written by Nicholas Wootton and Amanda Kate Shuman. It o ...
".


Transpositions

After 1.d4 Nc6 Black should be ready for various continuations; however, White cannot just ignore the fact that his opponent is ready to play ...e5 in the next move. Therefore, practically speaking, White is more likely to limit himself to the move 2.Nf3, trying to reach a position where he has a theoretical advantage. Black could respond to Nf3 with two main moves: *2...d6 can transpose to the
Pirc Defense The Pirc Defence ( ) is a chess opening characterised by the response of Black to 1.e4 with 1...d6 and 2...Nf6, followed by ...g6 and ...Bg7, while allowing White to establish a with pawns on d4 and e4. It is named after the Slovenian grandmaste ...
(if Black successfully plays d6 and g6, White must play e4 and go into open games theory) or the
King's Indian Defence The King's Indian Defence (or KID) is a common chess opening. It is defined by the following moves: : 1. d4 Nf6 : 2. c4 g6 Black intends to follow up with 3...Bg7 and 4...d6 (the Grünfeld Defence arises when Black plays 3...d5 instead and ...
if White plays an early c4 and goes into closed games theory. Unusual sequences after 2.Nf3 d6: **
Dutch Defence The Dutch Defence is a chess opening characterised by the moves: : 1. d4 f5 Black's 1...f5 stakes a claim to the e4-square and envisions an attack in the middlegame on White's ; however, it also weakens Black's kingside to some extent, espec ...
– 3.g3 g6 4.Bg2 Bg7 5.0-0 f5 6.d5 **
Ruy Lopez The Ruy Lopez (; ), also called the Spanish Opening or Spanish Game, is a chess opening characterised by the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bb5 The Ruy Lopez remains one of the most popular chess openings, featuring many variations. In ...
– 3.e4 e5 4.Bb5 exd4 5.Qxd4 *2...e6 can transpose to the
Nimzo-Indian Defence 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 ...
,
Bogo-Indian Defence The Bogo-Indian Defence is a chess opening characterised by the moves: :1. d4 Nf6 :2. c4 e6 :3. Nf3 Bb4+ The position after 1.d4 Nf6 2.c4 e6 is common. The traditional move for White here is 3.Nc3, threatening to set up a big pawn centre wi ...
and the
Chigorin Defense The Chigorin Defense is a chess opening named for 19th-century Russian master Mikhail Chigorin. An uncommonly played defense to the Queen's Gambit, it begins with the following moves: :1. d4 d5 :2. c4 Nc6 The Chigorin Defense violates seve ...
if White plays c4 immediately. If White tries going for an open game, the game can transpose to a Guimard French or another French line with 4...e5, or the
Nimzowitsch Defence 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 of the board ...
.


Illustrative games

Erich Weinitschke Erich Weinitschke, born 10 March 1910, was a German chess master. Weinitschke was born in Dzierżoniów in Silesia in March 1910, 1910. He took 10th at Bad Elster 1938 (Efim Bogoljubow won), took 4th at Bad Warmbrunn (now Cieplice Śląskie–Zdrà ...
vs.
Efim Bogoljubov Efim Bogoljubow, also known as Efim Dimitrijewitsch Bogoljubow (April 14, 1889 â€“ June 18, 1952), was a Russian-born German Grandmaster (chess), chess grandmaster. Early career Bogoljubow learned how to play chess at 15 years old, and dev ...
, Bad Elster, Germany, 1938
nalysis by Sid Pickard


Notes


References

* * * {{cite book , author= Sid Pickard , year=2001 , title=The Bozo-Indian Defense , publisher=ChessCentral , url-access=registration , url=https://www.chesscentral.com/the-bozo-indian-defense-chess-opening-e-book-download/ Chess openings