Chess Opening Theory/1. e4/1...b6/2. d4/2...Bb7/3. Bd3/3...Nf6

This continues pressuring on e4. White adds a defender; most likely Nd2 or f3.


 * Nd2 defends the pawn and solidifies the white center -- it also allows black to create a center of his own. Position is nearly equal.
 * f3 leads to Nc6, pressuring the d4 pawn. This leads to a huge amount of central tension.