Chess Opening Theory/1. e4/1...e5/2. Nc3/2...f5

This is simply a King's Gambit reversed, but with Nc3 added for White. This makes it not sound - opening the kingside when you have less development is not a good idea.

3. exf5—After Nf6 to prevent Qh4+, there is g4! immediately gaining initiative. Not only are we a pawn up, Black's kingside is also quite weak while our kingside is quite safe.

3. Nf3 - This directly transposes to the Latvian Gambit Declined, it is not the best, but white can still get a position with more development than black after 3...fxe4, 4. Nxe5 Nf6 5. Bc4, and Stockfish 16 gives this a +0,7 advantage.

3. d4 - This has a slight similarity to the Falkbeer Countergambit in the King's Gambit, since black can't take the e4 pawn because of Qh5+!, instead, black should play exd4 and white should play Qxd4, but there is also the astonishing, exf5, if black plays dxc3, white will play Qh5+ after Ke7, Bg5+ and Nf6, white can just play the absurd-looking move O-O-O if black were to take the pawn, Kb1!, sacrificing yet a pawn, and black has to deal with a lot of attacking possibilities, after d5, Nf3, white's a attack is really strong.