Heal Nc6, hurt Nf6.
+1
up to #155 by me:
1st: 2...Nc6 Mainline 90 points
2nd: 2...Nf6 Petrov Defense 41 points
3rd: 2...d6 Philidor 21 points
4th: 2...Bc5 20 points
5th: 2...Bd6 9 points
6th: 2...Qe7 0 points OUT
7th: 2...f6 Damiano Defense 0 points OUT
8th: 2...d5 Elephant Gambit 0 points OUT
9th: 2...Qf6 0 points OUT
10th: 2...f5 Latvian Gambit 0 points OUT
Heal Nc6 Hurt Bd6