3.....Qe5+ is a loser, allowing White to develop and then gain time on the Q with d4. 3.....Qa5 is main line. Some Black players opt to develop their Q-side and castle long ! That can be very tricky. Most solid for Black after 3.....Qa5 is to develop K-side and castle on that side. And to safeguard the Q with .....c6 and ....Qc7
3......Qd8 is another main line, though that admits the Q coming out to d5 was suspect, as White is ahead in development in an open position.
A lot of times my opponents respond with with move 2...d5 to 1.e4 which is the Scandinavian Defense: Mieses Kotroc Variation. I see it A LOT and the game always ends in my favour. I just don't understand the opening theory behind this, since it defies opening principles. Maybe in the era of Romantic Chess it would have been a popular line, but now with careful play from white, it just forces easy developement and unsuspecting attacks on the Queen (very easy to pin on the c6 with the white bishop).
Can someone tell me the theory behind this opening? How often do you use it? What are your thoughts on it?