Benko Gambit Declined: Main Line

1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3

ECO A57

The Benko Gambit Declined: Main Line is a chess opening reached after 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3, catalogued under code A57 in the Encyclopaedia of Chess Openings (ECO).

The defining move Nf3 is chosen by White on move 4.

Study this line with a grandmaster

This position is covered in the Benko Gambit 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.