1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 d6 {A common response.} 5. Ng5 {We get a Fried Liver attack where White has the misleading pawn on d3. It has appeared to fool both players on a few occasions.} 5... d5 {The lost tempo I was talking about.} 6. exd5 Nxd5 {If 6...Na5 White can castle going into the Morphy variation a healthy tempo up.} 7. Nxf7 Kxf7 8. Qf3+ Ke6 9. Nc3 {And now Black takes advantage of the d-pawn being advanced by....} 9... Bb4 {...pinning the Knight on c3. 13 times this has appeared on RHP and only three times has White taken on d5. It wins back the piece. In the other 10 cases (White won some and Black some) both players think the pin nuetralises the c3 Knight's hold on d5. 10.Bxd5+ is perfectly playable. 10...Qxd5 11.Qxd5+}