← Queen's Indian Defense

Practice: Queen's Indian, Bb4+ Line

Black checks on b4

Black throws in an early Bb4+ before committing the pawn structure, forcing White to block with a piece and possibly weaken the queenside.

1. d4 Nf6
2. c4 e6
3. Nf3 Bb4+
4. Nbd2 b6
5. e3 Bb7
♟

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Key strategic ideas

  • Black places the light-squared bishop on b7, controlling e4 from a distance instead of occupying the centre with pawns.
  • White often plays b3 and Bb2 to mirror Black's setup. The game becomes a quiet strategic battle where small advantages matter.
  • The ...Ba6 line is a sharp attempt to trade light-squared bishops. This reduces White's attacking potential and makes Black's position easier to play.

Common mistakes & traps

  • After 4.a3 Ba6 5.Qc2 Bb7 6.Nc3 c5 7.e4, Black must not play passively. If Black tries 7...Nxe4? 8.Nxe4 d5, White can defend with the queen on c2 and come out ahead.
  • The Fianchetto Variation (4.g3) seems quiet, but Black who plays ...d5 carelessly can end up in a bad position. The Bg2 puts lasting pressure on the queenside.

Pawn structure notes

The structure is flexible with Black's pawns on d5 and e6. White's centre (d4-c4) faces pressure from the b7 bishop. The tension in the centre can last well into the middlegame.

Tips

  • Develop naturally with Bd3, Nf3, and O-O before committing to a plan
  • The light-squared bishop on b7 is Black's best piece — keep it active
  • Challenge the centre with ...c5 when White's king is committed
  • Avoid trading the dark-squared bishop unless it gives you a clear advantage
  • In the e3 setup, be patient — White's attack comes after full development

About this line

This line is rated intermediate. Practice it repeatedly until you can play the entire sequence without thinking. The in-app trainer tracks your perfect streaks and celebrates milestones.