Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 g6

ECO E12

The Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation is a chess opening line in the Queen's Indian Defense complex, reached after 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 g6.

It is catalogued under code E12 in the Encyclopaedia of Chess Openings (ECO).

The defining move g6 is chosen by Black on move 5.

Study this line with a grandmaster

This position is covered in the Bogo-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.