One of my online chess games. More like an 8-move Vienna Game, since Black’s 8th move leads to a forced mate in 2. Some annotations below . . .
4. …exd4? (4. …Bxd4 would prevent White’s next move.)
5. …Bd6?? (5. …d6)
7. Qg4 (7. Qxd4 is also good.)
7. …g6? (7. …Kf8 would be better for reasons that will soon become clear.)
8. …Ne7??