Chess Opening Theory/1. e4/1...e5/2. Nc3/2...Nc6/3. f4/3...exf4

= Vienna Gambit= The accepted line of the Vienna Gambit is a popular opening and can be traced all the way back to the 19th century, used by top players like Wilhelm Steinitz and Emanuel Lasker. It frequently leads to a wild game and White gains a strong center at the expense of losing the ability to castle allowing Black to make serious inroads into the White Kingside. Oftentimes, Black will force White's king to move up the chessboard in their attack. With perfect play, Black most likely holds a small advantage.

Here, White only has two serious replies: (Knight Variation) or  (Steinitz Gambit) to defend Black's incoming Qh4+.

Theory table
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'''1. e4 e5 2. Nc3 Nc6 3. f4 exf4'''