1.Rd3 Re6
2.Qc3 Rc6
3.Qb2

1. .. Qa8
   4.Qc7

Alena, after 5.Rc3, I have a hard time finding a path where black doesn't lose a pawn on the queen side, too, giving white, eventually a passed pawn to go with the one he won on the king side- close to decisive.

Taras2k, what about 1.Rd3 Re6? This might give white some advantage, but it surely looks small to me.

1.Rd3 ed
2.Bd5 d2
3.Bf7+ Rf7
4.Qd8 Kg7
5.Qd2

1. Rd3 ed

1.g4 Qd1+
2.Bf1 Re6
3.Qh4 g5
4.Qxg5+ Bg6

I only see a small advantage for white.