Nimzo-Indian Defense: Rubinstein System
The Rubinstein System is 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3, White's most common way of meeting the Nimzo-Indian Defense. Read the guide
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Statistics from Lichess
1,836,342 games: White 49.3% / Draw 5.9% / Black 44.8%
| Next move | Games | White / Draw / BlackW / D / B |
|---|---|---|
| Nimzo-Indian Defense: Normal Variation | 737,024737K | |
| E41 | 340,651341K | |
| Nimzo-Indian Defense: St. Petersburg Variation | 262,430262K | |
| 187,467187K | ||
| 177,201177K | ||
| 87,83388K | ||
| Taimanov Variation | 14,58715K | |
| 9,5149,514 |
Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Nov 7, 2026
Engine evaluation
+0.16 The position is about equal
Best play: 4... O-O 5. Bd3 c5 6. Nf3 d5 7. cxd5 exd5 8. dxc5 Nbd7 9. Bd2
Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.
By rating
Rating changes little here: White scores 52% under 1400, 53% at 2200 and up and 52% in master games (wins plus half the draws).
| Players | Games | White / Draw / BlackW / D / B |
|---|---|---|
| Under 1400 | 71K | |
| 1400–1799 | 436K | |
| 1800–2199 | 971K | |
| 2200 and up | 573K | |
| Masters, over the board | 36K |
Master games
- Caruana, F. – Carlsen, M.
- Ding Liren – Carlsen, M.
- Carlsen, M. – Caruana, F.
- Carlsen, M. – Anand, V.
- Carlsen, M. – So, W.
Rated blitz, rapid and classical Lichess games by rating band, and over-the-board games of players rated 2200+ from the Lichess masters database, updated Sep 27, 2026
Description
The Rubinstein System is 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3, White's most common way of meeting the Nimzo-Indian Defense. It is named after Akiba Rubinstein. White simply continues development before choosing a plan, and Svetozar Gligorić and Lajos Portisch did much for its theory and practice at the top level.
Main lines
Black has three main replies, 4...O-O, 4...c5 and 4...b6, and sometimes plays 4...d5 or 4...Nc6, the Taimanov Variation.
- 4...O-O is the most flexible and most common. The main line runs 5.Bd3 d5 6.Nf3 c5 7.O-O: White has finished developing the kingside and Black has claimed a share of the centre. Important continuations are the Parma Variation 7...dxc4 8.Bxc4 Nbd7, the Karpov Variation 7...dxc4 8.Bxc4 cxd4 9.exd4 b6, one of Black's most reliable defences, and the main variation 7...Nc6 8.a3 Bxc3 9.bxc3 dxc4 10.Bxc4 Qc7, in which Black equalises in all lines but must know White's many eleventh moves.
- 4...c5 puts pressure on d4. In the Hübner Variation, 5.Bd3 Nc6 6.Nf3 Bxc3+ 7.bxc3 d6, Black gives up the bishop at once to blockade the dark squares with ...d6 and ...e5. Bobby Fischer used it with great effect in game 5 of his 1972 match against Boris Spassky. With 5.Ne2, the Rubinstein Variation, White avoids doubled pawns.
- 4...b6, favoured by Nimzowitsch, fianchettoes the light-squared bishop to control e4. White usually answers 5.Ne2 or 5.Bd3.
Strengths and weaknesses
The main line of the Rubinstein has held up very well for Black. Since the 1980s White has therefore often looked elsewhere, for example by developing the knight to e2 rather than f3, so that it can recapture on c3 and avoid doubled pawns. Two such lines after 4...O-O are the Reshevsky Variation, 5.Ne2, and the Modern Variation, 5.Bd3 d5 6.Ne2.
Who plays it
Besides Gligorić and Portisch on the white side, many of its lines carry the names of the players who shaped them as Black: Bruno Parma, Anatoly Karpov, Bent Larsen and Robert Hübner.
The numbers
On Lichess White wins 49.3% of the 1.8 million games and Black 44.8%. Under 1800 White wins about 51% against 45.0–45.9%, and from 2200 up 48.9% against 43.4%, with 7.7% draws. In 36,178 master games over the board 44.9% were drawn, White won 29.7% and Black 25.4%.
Suggest an improvement or report a mistake
How to play against the Nimzo-Indian Defense: Rubinstein System
4…b6 (Nimzo-Indian Defense: St. Petersburg Variation) scores best for Black: 48.7%, with Black winning 45.7% and White 48.3% of 262K games. The most played, 4…O-O, scores 48.6% in 737K games, and 4…d5 scores lowest: 45.6%. Stockfish's first choice is 4…O-O.
Main answers: those played in at least 5% of these games. Score: Black's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings
Popularity by year
The Nimzo-Indian Defense: Rubinstein System has lost ground since 2016: 0.066% of Lichess games in 2025, down from 0.094% (its peak: 0.11% in 2018).
Numbers by year
| Year | Share of games | Games |
|---|---|---|
| 2016 | 0.094% | 33,656 |
| 2017 | 0.1% | 55,852 |
| 2018 | 0.11% | 85,032 |
| 2019 | 0.089% | 111,502 |
| 2020 | 0.082% | 239,390 |
| 2021 | 0.064% | 249,615 |
| 2022 | 0.065% | 243,618 |
| 2023 | 0.066% | 249,956 |
| 2024 | 0.064% | 229,652 |
| 2025 | 0.066% | 228,898 |
| 2026 (Jan–Apr) | 0.069% | 75,576 |
Share of rated Lichess games between players rated 1600 to 2500 (blitz, rapid and classical) that reach this position, by year; 2026: January to April. Which openings are rising and falling
Variations (5)
All 47 named lines that continue from here
No line matches.
- E46 Nimzo-Indian Defense: Normal Variation 4 moves
- E41 Rubinstein System 4 moves
- E40 Taimanov Variation 4 moves
- E43 Nimzo-Indian Defense: St. Petersburg Variation 4 moves
- E43 Nimzo-Indian Defense: St. Petersburg Variation 7 moves
- E50 Nimzo-Indian Defense 5 moves
- E47 Normal Variation 5 moves
- E46 Nimzo-Indian Defense: Reshevsky Variation 5 moves
- E41 Hübner Variation 7 moves
- E42 Rubinstein Variation 5 moves
- E43 St. Petersburg Variation 6 moves
- E44 St. Petersburg Variation 5 moves
- E29 Nimzo-Indian Defense: Sämisch Variation 7 moves
- E28 Nimzo-Indian Defense: Sämisch Variation 6 moves
- E48 Classical Defense 5 moves
- E51 Normal Variation, Ragozin Variation 5 moves
- E41 Hübner Variation 8 moves
- E42 Main Line 7 moves
- E42 Sherbakov Attack 7 moves
- E46 Nimzo-Indian Defense: Simagin Variation 6 moves
- E43 St. Petersburg Variation 6 moves
- E43 Nimzo-Indian Defense: St. Petersburg Variation 8 moves
- E44 American Variation 5 moves
- E45 Fischer Variation 5 moves
- E44 Romanishin–Psakhis Variation 6 moves
- E43 with Ne4 6 moves
- E29 Capablanca Variation 9 moves
- E49 Nimzo-Indian Defense: Normal Variation, Botvinnik System 7 moves
- E53 Nimzo-Indian Defense: Normal Variation, Gligoric System 6 moves
- E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense 6 moves
- E51 Nimzo-Indian Defense: Normal Variation, Sämisch Deferred 6 moves
- E48 Nimzo-Indian Defense: Ragozin Defense 7 moves
- E43 St. Petersburg Variation 7 moves
- E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense 11 moves
- E53 Gligoric System 7 moves
- E56 Bernstein Defense 7 moves
- E54 Exchange Variation 8 moves
- E53 Keres Variation 7 moves
- E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense 7 moves
- E51 Nimzo-Indian Defense: Ragozin Variation 7 moves
- E43 St. Petersburg Variation 7 moves
- E58 Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line 9 moves
- E57 Bernstein Defense 9 moves
- E55 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation 8 moves
- E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation 8 moves
- E43 St. Petersburg Variation 9 moves
- E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense 10 moves
Sources
- History and theory: adapted from the Wikipedia article Nimzo-Indian Defence, version of 26 October 2026, under CC BY-SA 4.0.
- Results: Lichess opening explorer, figures collected from September to November 2026.
Cite this page
Caissa Codex. “Nimzo-Indian Defense: Rubinstein System (E40)”. Lichess data as of 7 Nov 2026. https://chesscodex.org/openings/nimzo-indian-defense-rubinstein-system