King's Gambit
The romantic 2.f4: sacrifice a pawn for the centre and the f-file. You play White. The King's Gambit was the favourite of the Romantic era: White gives up the f-pawn for quick development and an open f-file. Fischer famously wrote "A Bust to the King's Gambit" in 1961, recommending 3...d6, now called the Fischer Defence. Spassky and Bronstein still played it with success.