411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...b6/2. d4/2...Bb7/3. Bd3/3...Nf6
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Owen Defence
This continues pressuring on e4. White adds a defender; most likely /4. Qe2/, /4. Nd2/ or /4. 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.