Two Knights Defense, Fried Liver Attack

The Fried Liver Attack, also called the Fegatello Attack (named after an Italian idiom meaning "dead as a piece of liver"), is a chess opening. This opening is a variation of the Two Knights Defense in which White sacrifices a knight for an attack on Black's king. The opening begins with the moves:
This is the Two Knights Defense where White has chosen the offensive line 4.Ng5, but Black's last move is risky (other Black choices include 5...Na5, 5...b5, and 5...Nd4). White can now get an advantage with 6.d4 (the Lolli Attack); however, the Fried Liver Attack involves a knight sacrifice on f7, defined by the moves:
The opening is classified as code C57 in the "Encyclopaedia of Chess Openings".
History.
The Fried Liver Attack has been known for many centuries, the earliest known example being a game played by Giulio Cesare Polerio before 1606.
Considerations.
Play usually continues 7.Qf3+ Ke6 8.Nc3 ("diagram"). Black will play 8...Nb4 and follow up with ...c6, bolstering his pinned knight on d5. White can the b4-knight to abandon protection of the d5-knight with 9.a3, but after 9...Nxc2+ 10.Kd1 Nxa1 11.Nxd5 Qh4 he loses. Therefore White will choose one of 9.Qe4, 9.Bb3 or 9.0-0. White has a strong attack, but it has not yet been proven to be decisive. Because defence is harder to play than attack in this variation, the Fried Liver is dangerous for Black, particularly with shorter time controls. Another consideration is that after 5...Nxd5 White can deviate with 6.d4 (the Lolli Attack), which many consider stronger than the Fried Liver Attack.