The Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 4.Bg5 arises after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 and falls under ECO code E30. With 4.Bg5, White answers Black's pin with a counter-pin, and the e4 square becomes contested territory for both sides. A subtler consequence is that the pinned knight no longer controls d5, which — as van der Sterren has noted — makes the ...d5 advance both the logical idea and the necessary follow-up after 4.Bg5. Play almost invariably continues with either 4...h6 5.Bh4 c5 6.d5 or 4...c5 5.d5 h6 6.Bh4. This line is relatively rare in the Nimzo-Indian, appearing in only about 2% of master games in the Lichess database. Unlike the Ragozin or Queen's Gambit Declined, the absence of a Black pawn on d5 means White has no immediate target to attack in the center. With 1.9 million Lichess games across all rating levels, it is a specialized opening choice.
History and Notable Players
It arises from the Nimzo-Indian Defense. Among the most prolific practitioners on the White side are Boris V Spassky (30 games), Guntram Gaertner (28 games), Lluis Comas Fabrego (26 games). On the Black side, notable exponents include Wolfgang Unzicker (8 games), Gyula Sax (8 games), Viktor Korchnoi (7 games).
Statistics
Based on 1.9 million Lichess games across all rating levels:
- White wins: 47.8%
- Black wins: 47.4%
- Draws: 4.8%
The statistics show a roughly balanced opening where both sides have equal chances.
Main Lines and Variations
After 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5, the main continuations include:
Each of these lines leads to distinct types of positions and requires its own understanding of the resulting pawn structures and piece placements.
Common Mistakes to Avoid
- Allowing White to build an overwhelming center: Hypermodern openings allow White space in the center, but you need to strike back at the right moment. Delaying the counterattack too long can leave you without active play.
Practice on Chessiverse
The best way to learn the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 4.Bg5 is through practice. On Chessiverse, you can play chess against computer opponents from any opening or custom position. Our AI bots range from beginner to grandmaster level, each with unique playing styles — from aggressive attackers to solid defenders. Choose a bot that matches your rating and work your way up as you master the opening's key ideas.
