ECO C21 Openings

Beyer Gambit

Philidor Gambit

Center Game Accepted

Von der Lasa Gambit

Ross Gambit, Center

Danish Gambit

Sorensen Defense, Center

Danish Gambit Accepted

Copenhagen Defense, Danish Gambit

Schlechter Defense, Center

Classical Defense, Danish Gambit

Chigorin Defense, Danish Gambit

Svenonius Defense, Center

Halasz-McDonnell Gambit

Crocodile Variation, Center Game

Lanc-Arnold Gambit, Center

Scippler Gambit, Center