Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. d4/4...exd4/5. O-O/5...Nxe4/6. Nc3/6...dxc3/7. Bxf7/7...Kxf7

= Nakhmanson Gambit =

7...Kxf7
The tactical point behind sacrificing the bishop on f7 is that White now has  8. Qd5+, regaining the piece (or one of the pieces, at  least).