Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...Na5/6. Bb5/6...c6/7. dxc6/7...bxc6/8. Be2/8...h6/9. Nf3/9...e4/10. Ne5

= Two Knights Defence =

10. Ne5.
The Knights moves to the center of the board, here it can easily be attacked again by Black, but White now has the opportunity to defend it with d4 or f4 or even consider retreating the Knight to g4 or c4.

Theory table
.
 * 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5

Statistics
Estimated next move likelihood Bd6 57%, Qd4 16%, Bc5 14%, Qc7 9%, Qd5 3%, Bb7 1%