Nimzo-Indian Defense: Classical Variation

The Classical Variation of the Nimzo-Indian Defense (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2), also called the Capablanca Variation, was popular in the early days of the Nimzo-Indian. It was later superseded by the Rubinstein System, 4.e3, but revived in the 1990s, and it is now just as popular.

The idea

White aims to get the two bishops without damaging the pawn structure: if Black takes on c3, the queen recaptures. The drawbacks are that the queen moves at least twice in the opening and that White's kingside development is delayed. So even though White gets the bishop pair, Black is usually advised to open the game quickly to exploit the lead in development.

Main lines

• 4...O-O, Black's most common reply. The main line runs 5.a3 Bxc3+ 6.Qxc3 b6 (Keres Defense in this database). After 7.Bg5 Bb7, White's most direct move is 8.f3, preparing e4, but after 8...h6 9.Bh4 d5 the pawn grab 10.cxd5 exd5 11.Bxf6 Qxf6 12.Qxc7 Ba6 is very dangerous for White because of Black's better development. White can also play 7.Nf3 Bb7 8.e3 and develop the dark-squared bishop on b2. 6...b5 is a gambit invented by Alvis Vītoliņš (Vitolins-Adorjan Gambit).
• 4...c5 (Berlin Variation in this database) uses the fact that the queen on c2 no longer defends d4, and White almost always replies 5.dxc5. 5...O-O is the Pirc Variation, one of the reasons 4.Qc2 was unpopular in the mid-20th century. It was revived for White by the discovery that after 6.a3 Bxc5 7.Nf3 Nc6 8.Bg5 Nd4 9.Nxd4 Bxd4 10.e3 Qa5 11.exd4 Qxg5 12.Qd2 Qxd2+ 13.Kxd2 the endgame gives White a slight edge. Players like Vladimir Kramnik have still defended Black's side against players like Garry Kasparov.
• 4...d5 (Noa Variation in this database). After 5.cxd5 Black can recapture with the queen, 5...Qxd5, the Romanishin System, or with the pawn. After 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 Black plays 7...c5 or 7...Nc6 intending ...e5, usually reaching a dynamically balanced position.
• 4...Nc6, the Zürich Variation, or Milner-Barry Variation after the British player Stuart Milner-Barry. Black gives up the dark-squared bishop and puts the central pawns on d6 and e5. A topical line is 5.Nf3 d6, but the variation is out of fashion because most players prefer not to block the c-pawn.

Strengths and weaknesses

Strengths

• White gets the bishop pair without doubled pawns.
• Black gets a lead in development and chances to open the game early.

Weaknesses

• White's queen moves several times and the kingside development is delayed.
• For Black, the Pirc Variation can end in the endgame after 13.Kxd2, which gives White a slight edge.

Who should play it

The Classical Variation suits White players who value the bishop pair and a healthy pawn structure. Black needs active, concrete play to exploit White's slow development.

The numbers

On Lichess White is ahead at every level: 52.7% against 44.2% for Black under 1400, 51.7% against 44.3% at 1400–1799, 49.2% against 45.1% at 1800–2199, and 48.0% against 43.6% from 2200 up. In about 29,500 master games White won 27.8%, Black 21.8%, and 50.4% were drawn.