Owen Defense is a chess opening with the ECO code B00. It goes 1. e4 b6. White opens with 1. e4 (the king's pawn) and Black answers 1... b6. After 2 moves it is White to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
Black answers 1.e4 with 1...b6 and ...Bb7, hitting e4 from afar. It is offbeat and gives White an easy centre.