The Scandinavian Defense is a chess opening that begins with the moves:
1. e4 d5
It is one of the oldest recorded openings, first recorded as being played between Francesc de Castellví and Narcís Vinyoles in Valencia in 1475 in what may be the first recorded game of modern chess, and being mentioned by Lucena in 1497.
It worked very well for me in one of my lichess games.
White sacrifices his pawn on b4 and then after Nb5, black queen is forced to keep an eye on c7 square. White then moves his bishop to c4, which looks like a natural developing move and usually Black responds with a6 or c6. White can sacrifice the light square bishop on f7 with check and when Black king captures back, White can go Qh5 and Black has to get out of check again! The idea for White's next move is to move the b5 knight with check, creating a discovered attack against the Black queen.
In my game, my opponent played e6 on move 6 but still I went for Qh5 and after Nf6 blunder by Black and knight check by White, I won the queen!