The Queen's Indian Defence: A Complete Repertoire for Black by IM Deboushnik De
The Queen's Indian Defence is a classical opening, usually valued more for its solid positional foundation than for its fighting potential. IM Deboushnik De's new repertoire keeps that foundation but adds novelties, ambitious ideas and aggressive lines that let Black fight for the initiative.
The central idea goes back to Aron Nimzowitsch. His 4...Ba6, aimed straight at the c4-pawn, turns a developing move into a question White has to answer immediately. The repertoire is built around that question, and around a broader principle: Black's setup should be decided by what White has already committed to.
A Repertoire Built on White's Decisions
After 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6, every way of defending c4 has a cost. Defending with b3 or Nbd2 leads to different development schemes. An early queen move can give Black chances to gain time.
Within the 4.Nc3 chapters, Black's dark-squared bishop may go to g7, d6, b4 or c5 depending on the centre and the available tempi. Against 4.a3, the repertoire claims d5 at once. After 4.Nc3 Bb7 5.a3, it prefers a flexible ...d6 with a potential kingside fianchetto.
Some lines become sharp early. Against 4.Nc3 Bb7 5.Bg5, Black chases the bishop with ...h6, ...g5 and ...Nh5 to win the bishop pair. After 4.a3 d5 5.Nc3 dxc4, White's Nxg5 strike opens the position around Black's king and calls for precise tactical play. Other chapters lead to strategic battles: active hanging pawns on c5 and d5, and doubled c-pawns as targets after ...Bxc3+.
The Author's Approach
IM Deboushnik De, a young Indian International Master with a strong focus on deep opening research, follows his Advance Caro-Kann course for White with a repertoire on the other side of the board. His aim is to combine fresh preparation and new ideas with a clear understanding of the positions that result.
The analysis repeatedly links moves to the reasons behind them: when to strike with ...d5 or ...c5, which bishop exchanges favour Black, and when activity justifies a structural concession. As the author puts it, the goal is to know what Black should be trying to achieve even after the game leaves the preparation.
Map of Variations
1.d4 Nf6 2.c4 e6 3.Nf3 b6
4.g3 Ba6
- 5.b3 d5 6.Bg2 Nbd7!? 7.O-O Be7 8.Nc3 Rc8 → Chapter 1
- 5.Nbd2 d5 6.Bg2 Be7 7.O-O O-O 8.b3 c5 → Chapter 2
- 5.Qa4 Bb7 6.Bg2 c5 7.dxc5 bxc5 → Chapter 3
- 5.Qc2 c5 6.d5 exd5 7.cxd5 Bb7 8.Bg2 Nxd5 → Chapter 4
- 5.Qb3 Nc6 6.Nbd2 d5 → Chapter 5
4.Nc3 Bb7
- 5.a3 d6 6.d5 g6 7.e4 Bg7 (6.Qc2 c5) → Chapter 6
- 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5 → Chapter 7
- 5.e3 d5 6.cxd5 exd5 → Chapter 8
- 5.g3 Bb4 6.Bg2 Bxc3+ 7.bxc3 h6 → Chapter 9
- 5.Qc2 c5 6.e4 cxd4 7.Nxd4 Bc5 8.Nb3 Bb4 → Chapter 10
- 5.Bf4 Bb4 6.e3 Ne4 7.Qc2 f5 → Chapter 11
4.Bf4 Bb7 5.e3 Bb4+
- 6.Nfd2 O-O → Chapter 12
- 6.Nbd2 O-O 7.Bd3 Nh5 → Chapter 12
4.a3 d5
- 5.Nc3 dxc4 6.Bg5 a6 7.e4 b5 8.e5 h6 9.Bh4 g5 10.Nxg5 hxg5 11.Bxg5 Be7 → Chapter 13
- 5.cxd5 exd5 6.Nc3 Be7 7.Bf4 O-O → Chapter 14
- 5.e3 Nbd7 6.Nc3 a6 → Chapter 15
Early sidelines
- 4.e3 Bb7 5.Bd3 d5 6.O-O Bd6 → Chapter 6 (5.Nc3 transposes → Chapter 8)
- 4.Bg5 Bb7 5.Nc3 h6 → Chapter 7
Premium Course Features
This is a Modern Chess Premium course, built as a complete training system:
- 15 theory chapters
- Video instruction throughout
- 30 test positions: critical moments with tactical and strategic solutions
- 15 training positions for interactive practice against the engine
- 15 model games showing the ideas in high-level play
- 15 things to remember, one from each chapter, covering the typical patterns and concepts of the repertoire
- Memory Booster for long-term recall of the key ideas
- To-Go Version of every chapter: condensed files for fast pre-game review
- Multilingual PGN files in English, German, French and Spanish
- Full download access: all materials are yours to keep
Extending Your 1.d4 Repertoire
The Queen's Indian answers 3.Nf3. If you also want a repertoire against 3.Nc3, The Complete Nimzo-Indian Repertoire covers that variation.
Start Your Queen's Indian Repertoire
The Queen's Indian Defence: A Complete Repertoire for Black gives you a clear answer to 3.Nf3, from the concrete questions of 4...Ba6 to the strategic battles of the 4.Nc3 and 4.a3 systems. Add the course to your library today and bring IM Deboushnik De's fresh ideas into your own games.