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ECO E51: Nimzo-Indian Defense

ECO E51 is part of volume E — Indian Defenses. The Lichess chess-openings dataset files 3 named lines under it. The shortest is Nimzo-Indian Defense: Normal Variation, Ragozin Variation: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5.

That position has come up in 611,150 Lichess games between players rated 1600 to 2500: White won 50.5%, 5.2% were drawn and Black won 44.3%.

OpeningMovesPlies
Nimzo-Indian Defense: Normal Variation, Ragozin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 10
Nimzo-Indian Defense: Normal Variation, Sämisch Deferred 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3 11
Nimzo-Indian Defense: Ragozin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O dxc4 14