Variations
King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense
4. exd5 e4 5. d3 Bb4 6. Bd2 e3
Vienna Game: Vienna Gambit, Breyer Variation
4. fxe5 Nxe4 5. Nf3 Be7
Vienna Game: Vienna Gambit, Kaufmann Variation
4. fxe5 Nxe4 5. Nf3 Bg4 6. Qe2
Vienna Game: Vienna Gambit, Modern Variation
4. fxe5 Nxe4 5. d3
Vienna Game: Vienna Gambit, Paulsen Attack
4. fxe5 Nxe4 5. Qf3