4) Nd4 is playable and puts a damper on white's aggression. Ne7 has some merits as well, though it blocks in your own bishop you can arrange a nice position after chasing the bishop away with pawns.
5) Be7 is kind of passive. I would shove it on out to c5; it can always retreat on either diagonal if assaulted too much and it points at his king and helps solidify your center if left to stand. I often go there and often retreat to sit on the rook to keep that diagonal.
6) B5 is usually not worth it. Not always, but the bishop escapes and your pawns are a mess afterward, you need a good *plan* for your position if you make this decision. Its not directly a mistake, you just have to use the pawns productively after that or they will become a problem.
9) I think take the pawn here. That keeps your black bishop mobile. exd4, cxd4, proceed with Na5 plan from there?
I like to start game with c6(black) but sometimes i want to start with another opening.this is an opening that i played against a friend.im not good in this opening and i think this is not strong opening for black because white has two centeral pawns but black just has 1!
look at my game to understand.i were so lucky to win my opponent because of his mistakes.
please help me about this opening...thanks