English Defense: Hartlaub Gambit Declined

1.c4 e6 2.d4 b6 3.Nc3 Bb7 4.e4 f5 5.d5

ECO A40

The English Defense: Hartlaub Gambit Declined is a chess opening line in the English Defense complex, reached after 1.c4 e6 2.d4 b6 3.Nc3 Bb7 4.e4 f5 5.d5.

It is catalogued under code A40 in the Encyclopaedia of Chess Openings (ECO).

The defining move d5 is chosen by White on move 5.

Do you want to learn openings?

Start with a GM-authored repertoire you study move by move, then practice against a human-like AI opponent:

• Catalan Opening
• King's Indian Defense with ...e5

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.