ECO A40 Openings

Hartlaub Gambit, English

St George's Gambit

Polish Defense

Spassky Gambit, Polish Defense

Queen Fianchetto, Queen Pawn Game

Charlick Gambit; Englund Gambit

Englund Gambit Declined

Diemer Counterattack

Thuring Gambit; Hartlaub-Charlick Gambit

Soller; Purchas Gambit

Englund; Behting Gambit

Felbecker Gambit

Soller Gambit Deferred

Zilbermints Gambit II, Englund Gambit

Zilbermints Gambit, Englund Gambit

Englund Gambit

Stockhom Variation, Englund Gambit

Mosquito Gambit, Englund

Horwitz Defense

Franco-Indian Defense

Seneschaud Variation, Dutch

English Defense

Perrin Variation

Poli Gambit

Hartlaub Gambit Declined

Hartlaub Gambit Accepted

Keres Defense, Indian; Kangaroo Defense

Transpositional Variation, Keres Defense

Zilbermints Gambit

Borg Gambit

Queen Pawn Fianchetto

Kotov-Robatsch Defense

Pseudo-Saemisch

Rossolimo Variation

Neo-Modern Defense

Beefeater Variation

Modern Defense

Kotov Variation, Modern

Lizard Defense; Pirc-Diemer Gambit

Bogoljubov; Mikenas-Van Geet Defense

Lundin Defense

Lithuanian Variation, Mikenas

Cannstatter Variation, Mikenas

Pozarek Gambit

Montevideo Defense

Zaire Defense

Polish Variation

Dunworth Variation, Modern Defense