Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nc3 c5 5.d5 b5

ECO E21

The Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit is a chess opening line in the Nimzo-Indian Defense complex, reached after 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nc3 c5 5.d5 b5.

It is catalogued under code E21 in the Encyclopaedia of Chess Openings (ECO).

The defining move b5 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.