KGA: Kieseritzky Gambit: the 8 best defenses


The first 2 available historical Kieseritzky gambit games Greco - NN (1620) and Lafon Le Jeune - Roussereau (1680)
http://www.chessgames.com/perl/chessgame?gid=1272509
http://www.chessgames.com/perl/chessgame?gid=1259986
features the Long Whip defense. In the first game, NN makes a mistake 7...Be7(?) while Roussereau makes a mistake 9...Qe7(?)
The correct move seems to be 9...f3.