The King’s Gambit has always been known as one of the most exciting openings in chess history, it leads to odd piece placement, Kings who are stuck in the center of the board and gaps the surrounding defense ready to be exploited. Qh4+ is a common idea in King’s Gambit for Black to start to put pressure on the White King with hopes of getting the dark square bishop involved on the f2- c6 or e1 -b4 diagonal, both of those are seen in this game.
