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

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6

ECO E45

The Nimzo-Indian Defense: St. Petersburg Variation, Fischer 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 Ba6.

It is catalogued under code E45 in the Encyclopaedia of Chess Openings (ECO).

The defining move Ba6 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.