Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...Bc5/5. Nxf7/5...Bxf2/6. Kf1/6...Qe7

6... Qe7
White must now take their one and only opportunity to complete their fork and capture the rook before the game gains some complications. Otherwise Black will set up a very dangerous file with Rf8 aiming down at the king.