One obvious con is that white can avoid the petroff by playing Bc4.
Anybody can basically avoid any opening. White can also play the Danish Gambit, King's Gambit, or Vienna, just to name a few and it is not limited to this. At the same time, Black avoids the Scotch, Italian, and Ruy Lopez.
2.Bc4 is not a con, but rather an inferior move compared to 2.Nf3, though by no means busted, but Black should be happy that White just made his task of equalizing the position easier for him!
1) yes, black can't avoid kings gambit, Vienna, ...etc with Petrov. Black can avoid Spanish and scotch also. With Bc4, white has urosov & Italian options open. So, black has to learn that specially at amateur levels.
2) why is Bc4 inferior to Nf3?
White can't force a transposition to the Italian from the Bishop's Opening. I personally like this option for black:
It's like a Hanham Philidor but white's pawn is on d3. Black also has the (more common) option of 4...d5.
One obvious con is that white can avoid the petroff by playing Bc4.
Anybody can basically avoid any opening. White can also play the Danish Gambit, King's Gambit, or Vienna, just to name a few and it is not limited to this. At the same time, Black avoids the Scotch, Italian, and Ruy Lopez.
2.Bc4 is not a con, but rather an inferior move compared to 2.Nf3, though by no means busted, but Black should be happy that White just made his task of equalizing the position easier for him!
1) yes, black can't avoid kings gambit, Vienna, ...etc with Petrov. Black can avoid Spanish and scotch also. With Bc4, white has urosov & Italian options open. So, black has to learn that specially at amateur levels.
2) why is Bc4 inferior to Nf3?
1) I think after 1.e4 e5 2.Nf3 by playing 2...Nf6 you are overall narrowing the amount of theory you are required to know as black, compared with other move 2 responses. Often white will play 3.Nc3 which isn't very challenging - relatively.
2) I don't know if you can say 2.Bc4 is inferior to 2.Nf3, since top players have played both ways many times. But from black's point of view, I am fine playing against 2.Bc4 which can be an interesting game. I think it is a good way for white to play also.