Catalan Opening: Open Defense, Modern Sharp Variation

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+

ECO E04

The Catalan Opening: Open Defense, Modern Sharp Variation is a chess opening line in the Catalan Opening complex, reached after 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+.

It is catalogued under code E04 in the Encyclopaedia of Chess Openings (ECO).

The defining move Bb4+ is chosen by Black on move 6.

Study this line with a grandmaster

This position is covered in the Catalan Opening 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.