The King's Gambit is a chess opening that begins:

1. e4 e5
2. f4
White offers a pawn to divert the Black e-pawn and build a stronger center with d2-d4. Theory has shown that in order for Black to maintain the one pawn advantage, moves must be made that seriously weaken the position of the Black pieces. King's Gambit is one of the oldest documented openings as it was examined by the 17th century Italian chess player Giulio Polerio.[1] It is in an older book by Luis Ramirez de Lucena [2] The King's Gambit is now rarely seen at the master level. Black can obtain a reasonable position by relinquishing the extra pawn at a later time and consolidating defensively.  The King's gambit may either be accepted (black takes the f pawn) or declined