Chess Opening Theory/1. e4/1...e5/2. Nf3/2...c5/3. Nxe5/3...f6/4. Qh5

4. Qh5+!
This move will eventually win a rook with 5. Nxg6!! followed by 6. Qxh8 or wins more and more pawns and pieces. Black has two legal moves: /4...g6/ and /4...Ke7/.

'''1. e4 e5 2. Nf3 c5? 3. Nxe5! f6? 4. Qh5+!'''