Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nd4/4. Nxe5/4...Qg5/5. Nxf7

5. Nxf7??
Here 5. Nxf7?? is a blunder. White would be better off losing her knight for two pawns with 5. Bxf7+, but Nxf7 loses a major piece or the game to 5...Qxg2.