Nimzo-Indian Defense: St. Petersburg Variation, American Variation

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ne4

ECO E44

The Nimzo-Indian Defense: St. Petersburg Variation, American Variation is a chess opening line in the Nimzo-Indian Defense complex, reached after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ne4.

It is catalogued under code E44 in the Encyclopaedia of Chess Openings (ECO).

The defining move Ne4 is chosen by Black on move 5.

Study this line with a grandmaster

This position is covered in the Nimzo-Indian Defense course: a GM-authored repertoire you study move by move, then practice against a human-like AI opponent.

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.