Bogo-Indian Defense: Nimzowitsch Variation

About this variation

Black supports the bishop with 4...Qe7, keeping the pin and preparing ...Nc6 and ...e5. It is the classical main line.

The Nimzowitsch Variation is 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7. Black supports the bishop on b4 with the queen, so that a trade on d2 or b4 does not cost time. The queen on e7 also supports a later ...e5, which is one of Black's main central breaks.

White's main set-up is g3, Bg2, O-O and Nc3, with a fianchetto that controls the long diagonal and keeps the king safe. White can also play a3 to ask the bishop to decide, or e3 with Bd3 for a more classical set-up. In each case, White aims for a small but lasting edge based on the extra space.

Black's plans include ...Nc6 and ...e5, opening the center and freeing the pieces, or ...d6 with ...e5 for a more solid structure. Black often trades the dark-squared bishops with ...Bxd2+ at a good moment, leaving White's remaining bishop on g2 and Black's on c8 to decide the game.

The Nimzowitsch Variation leads to quiet, maneuvering positions where understanding the pawn structure matters more than memorizing moves. Both sides have clear plans, and the game is usually decided in the middlegame or endgame.

A common mistake for Black is to play ...e5 before it is properly prepared, which can leave the d5 square weak. A common mistake for White is to play too slowly and allow Black's central break under good conditions.

This line suits Black players who like solid, classical positions with a clear plan, and White players who enjoy slow positional pressure.

One concrete line is 5. g3 Nc6 6. Bg2 Bxd2+ 7. Nbxd2 d6 8. O-O e5 9. d5 Nb8, when White has more space and Black aims for ...a5, ...Na6 and ...Nc5. The structure resembles some King's Indian lines but with fewer pieces on the board.

It is one of the main lines of the Bogo-Indian Defense.