Nimzo-Indian Defense · E37

Classical Variation, Noa Variation, San Remo Variation

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Nc6 8. e3 e5

The pawns on d4 and e5 stand in direct tension - the first player to resolve it chooses the structure. ...Bb4 pins the knight that supports e4: Black fights for the light squares, often trades on c3 to damage the pawns, and plays structure against the bishop pair.

The first 4 moves, explained

• 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
• 1... Nf6 Develops the knight to f6, eyeing d5 and e4.
• 2. c4 Fights for d5 from the flank - contesting the centre without committing a centre pawn.
• 2... e6 Supports the centre, adding control of d5.

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