Chess Opening Theory/1. e4/1...e5/2. Nf3/2...d6/3. d4/3...Nc6

3...Nc6

This move is uncommon, as 4.Bb5 is annoying, however, white is only a little better, and this may be playable after 4...exd4 or 4...Bd7. However, white has won far, far more games than black after 4.Bb5.