Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. d4/3...exd4/4. Nxd4/4...Qh4

4...Qh4
5. Nf5 Qxe4+ 6. Ne3. White will follow with Nc3 to prepare a longer building development. (MasPur08)

The Main Line is:

5. Nc3 Bb4 White's pawn on e4 is almost overloaded 6. Be2 ... End of Main Line Scotch Game, Steinitz Variation.

6. Be2 appears to lose a pawn after 6 ... Qxe4 or 6...Bxc3 7. bxc3 Qxe4

But White can reply with a powerful attacking idea 8. Nb5, with slight edge. +-