Bird Opening: Siegener Gambit

1.f4 e5 2.d4 exd4 3.Nf3 c5 4.c3

ECO A02

The Bird Opening: Siegener Gambit is a chess opening line in the Bird Opening complex, reached after 1.f4 e5 2.d4 exd4 3.Nf3 c5 4.c3.

It is catalogued under code A02 in the Encyclopaedia of Chess Openings (ECO).

The defining move c3 is chosen by White on move 4.

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.