Gambit is an opening in chess, often played by white, who sacrifices a piece (often a pawn) with the hope to gain a more prominent position. King's Gambit is one of the most aggressive and powerful openings in chess at the amateur level. The main aim of the King's gambit is that the white tries to weaken the central pawns of black so that they are able to capture central power. Its popularity declined in the 19th century when chess masters discovered plenty of ways through which black can have an equal position as white. CHESS NOTES FOR KING'S GAMBIT 1) e4 e5 2) f4 Here is the step-by-step instructions on how to perform the King's Gambit.