Queen's Indian Defense: Fianchetto Variation, Check Variation

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3 Bb4+

ECO E15

The Queen's Indian Defense: Fianchetto Variation, Check 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.g3 Ba6 5.b3 Bb4+.

It is catalogued under code E15 in the Encyclopaedia of Chess Openings (ECO).

The defining move Bb4+ is chosen by Black on move 5.

2 named continuations branch from this position, including the Intermezzo Line and the Modern Line.

Named variations

• Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line — ECO E15
• Queen's Indian Defense: Fianchetto Variation, Check Variation, Modern Line — ECO E15

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.