The Fegatello Attack, as it is otherwise known, has never been wholly proven. Black can, and in practice, often does hold on. The way to try is not to give the piece straight back, as shown in the game above. That just leaves White a good pawn up and the better position. Hang on to the piece by every means possible, and let White try his damnedest to get compensation.
The Traxler (Wilkes-Barre) is another descendant of the Two Knights that has never been busted, neither by humans nor by engines