Bogo-Indian Defence
Encyclopedia
The Bogo-Indian Defence is a chess opening
Chess opening
A chess opening is the group of initial moves of a chess game. Recognized sequences of opening moves are referred to as openings as initiated by White or defenses, as created in reply by Black. There are many dozens of different openings, and hundreds of named variants. The Oxford Companion to...

 characterised by the moves:
1. d4 Nf6
2. c4 e6
3. Nf3 Bb4+


The position arising 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 with 4.e4. However, 3.Nf3 is often played instead as a way of avoiding the Nimzo-Indian Defence
Nimzo-Indian Defence
The Nimzo-Indian Defence is a chess opening characterised by the moves:This hypermodern opening was developed by Grandmaster Aron Nimzowitsch who introduced it to master-level chess in the early 20th century. Unlike most Indian openings the Nimzo-Indian does not involve an immediate fianchetto,...

 (which would follow after 3.Nc3 Bb4). After 3.Nf3, Black usually plays 3...b6 (the Queen's Indian Defence
Queen's Indian Defense
The Queen's Indian Defense is a chess opening defined by the movesBy playing 3.Nf3, White sidesteps the Nimzo-Indian Defense that arises after 3.Nc3 Bb4. The Queen's Indian is regarded as the sister opening of the Nimzo-Indian, since both openings aim to impede White's efforts to gain full control...

) or 3...d5 (leading to the Queen's Gambit Declined
Queen's Gambit Declined
The Queen's Gambit Declined is a chess opening in which Black declines a pawn offered by White in the Queen's Gambit:This is known as the Orthodox Line of the Queen's Gambit Declined...

), but can instead play 3...Bb4+, the Bogo-Indian, named after Efim Bogoljubov. This opening is not as popular as the Queen's Indian, but is occasionally seen at all levels.

Variations

White has three viable moves to meet the check. 4.Nc3 is a transposition
Transposition (chess)
A transposition in chess is a sequence of moves that results in a position which may also be reached by another, more common sequence of moves. Transpositions are particularly common in opening, where a given position may be reached by different sequences of moves...

 to the Kasparov Variation of the Nimzo-Indian, therefore the main independent variations are 4.Bd2 and 4.Nbd2.

4. Bd2

4.Bd2 is the most common line, the bishop on b4 is now threatened and Black needs to decide what to do about it.
  • The simplest is to trade off the bishop by means of 4... Bxd2+; this line is not particularly popular, but has been played frequently by the Swedish grandmaster Ulf Andersson
    Ulf Andersson
    Ulf Andersson is a leading Swedish chess player. FIDE awarded him the International Master title in 1970 and the Grandmaster title in 1972 .-Career:...

    , often as a drawing line.
  • 4... Qe7 defending the bishop, and deferring the decision of what to do until later is the most common.
  • David Bronstein
    David Bronstein
    David Ionovich Bronstein was a Soviet chess grandmaster, who narrowly missed becoming World Chess Champion in 1951. Bronstein was described by his peers as a creative genius and master of tactics...

     tried the sharper alternative 4... a5 grabbing some space on the queenside at the cost of some structural weaknesses.
  • A more modern line is 4... c5, after 5.Bxb4 cxb4, Black's pawns are doubled, and a pawn has been pulled away from the centre, but the b4 pawn can also be annoying for White since it takes the c3-square away from the knight. In fact, one of White's major alternatives is 6.a3, trading off this pawn at once.
  • Simply retreating the bishop by means of 4... Be7 is also possible; Black benefits from losing a tempo since the white bishop is misplaced at d2. The line is somewhat passive, but solid.

4. Nbd2

4.Nbd2 is an alternative aiming to acquire the bishop
Bishop (chess)
A bishop is a piece in the board game of chess. Each player begins the game with two bishops. One starts between the king's knight and the king, the other between the queen's knight and the queen...

 for the knight
Knight (chess)
The knight is a piece in the game of chess, representing a knight . It is normally represented by a horse's head and neck. Each player starts with two knights, which begin on the row closest to the player, one square from the corner...

 or forcing Black's bishop to retreat. The downside is that the knight is developed to a square where it blocks the bishop, and d2 is a less active square than c3. The line is described in the Gambit Guide as "ambitious". Black's most common replies are 4...b6, 4...0-0, and 4...d5.

ECO code

Unless the game transposes to another opening, the Bogo-Indian is classified as E11 by the Encyclopaedia of Chess Openings
Encyclopaedia of Chess Openings
The Encyclopaedia of Chess Openings is a classification system for the opening moves in a game of chess. It is presented as a five volume book collection describing chess openings...

.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK