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

= Nakhmanson Gambit =

7. Bxf7+
Black is in check and must capture the bishop with 7...Kxf7, which allows  White to play 8.Qd5 recovering the piece.

The attempt to evade the fork with 7…Ke7?? doesn't work; White plays 8. Qd5! anyway to defend the bishop, and the threats of Re1 and Bg5 are crushing.