ECO A01
Nimzo-Larsen Attack
Also known as: Larsen's Opening, Nimzowitsch-Larsen Attack
The Nimzo-Larsen Attack, also called Larsen's Opening or the Nimzowitsch-Larsen Attack, arises after 1.b3 e5 2.Bb2 Nc6 3.e3. Rather than occupying the centre with pawns, White fianchettoes the queen's bishop to b2, where it eyes the long a1-h8 diagonal and pressures e5 and g7 from a distance. It is a hypermodern, strategically rich system that keeps White's structure flexible while sidestepping heavy mainline theory.
1. b3 e5 2. Bb2 Nc6 3. e3
Strategic ideas
The heart of the opening is the bishop on b2, which rakes the long diagonal toward Black's kingside and challenges the e5-pawn without a single central pawn advance. White plays on the flanks and from afar, aiming to provoke weaknesses, undermine Black's centre with moves like c4, and later strike with d4 or f4 once the pieces are ideally placed. Because the position is fluid, White chooses plans according to Black's setup rather than following a fixed sequence of moves.
The supporting move 3.e3 is quietly purposeful: it opens the diagonal for the light-squared bishop, prepares Nf3 and a comfortable kingside development, and keeps the option of c4 and Be2 or the more aggressive Bb5 to pin or trade Black's knight on c6. Black, for their part, enjoys a broad centre and must decide how far to advance it; overextension can hand White exactly the targets the b2-bishop craves, while a solid, restrained setup neutralises much of White's long-range pressure.
Main variations
After 1.b3 e5 2.Bb2 Nc6 3.e3, a principled continuation is 3...Nf6 4.Bb5, pinning the knight and increasing the pressure on e5, when White often follows with Nf3, an eventual Bxc6 to damage Black's structure, and play against the weakened centre. Black can also meet the fianchetto with 3...d5, staking out a firm centre, after which White reaches for c4 to question the d5-pawn and open lines for the b2-bishop.
White's development is highly flexible: Nf3, c4, Be2 (or Bb5), d3 or d4, and short castling can be arranged in various move orders depending on Black's plan. A recurring theme is the fight over the e5-square and the a1-h8 diagonal, and if Black is careless White may achieve the thematic pawn break that transforms latent pressure into a concrete attack against the enemy king.
History and background
The opening is named for two great strategists. Aron Nimzowitsch was a leading figure of the hypermodern movement, which argued that the centre could be controlled by pieces from a distance rather than occupied by pawns, and the fianchettoed b2-bishop is a natural expression of that philosophy. The Danish grandmaster Bent Larsen then championed 1.b3 at the highest level, employing it with great success and lending it his name, and today it remains a respected, original, and comparatively theory-light choice for players who prefer strategic understanding over memorised lines.
Key ideas
- 1.b3 fianchettoes the queen's bishop to b2, eyeing the long diagonal.
- White controls the centre from afar rather than occupying it with pawns.
- The b2-bishop pressures e5 and points toward Black's kingside on g7.
- Flexible development with e3, Nf3, c4 and Be2 or Bb5 suits many setups.
- A hypermodern, theory-light system rewarding strategy over memorisation.
- Named for Nimzowitsch's ideas and popularised by Bent Larsen.
Typical plans
White
- Complete the fianchetto and maintain pressure on e5 and the long diagonal.
- Play c4 to undermine Black's central pawns and open lines for the b2-bishop.
- Consider Bb5 to pin the c6-knight and damage Black's structure with Bxc6.
- Prepare a well-timed d4 or f4 break to convert long-range pressure into attack.
- Castle short and choose the plan that best answers Black's specific setup.
Black
- Build a broad, solid centre with moves like ...d5 without overextending.
- Develop naturally with ...Nf6 and challenge White's flexible structure.
- Guard the e5-pawn and the g7-square against the b2-bishop's pressure.
- Meet Bb5 calmly, avoiding structural damage after a possible Bxc6.
- Aim for harmonious development and equality by neutralising the long diagonal.