Owen Defense: Naselwaus Gambit is a chess opening with the ECO code B00, part of the Owen Defense family. It goes 1. e4 b6 2. d4 Bb7 3. Bg5. White opens with 1. e4 (the king's pawn) and Black answers 1... b6. After 5 moves it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. e4 – White plays the pawn to e4
1... b6 – Black plays the pawn to b6
2. d4 – White plays the pawn to d4
2... Bb7 – Black plays the bishop to b7
3. Bg5 – White plays the bishop to g5
About the Owen Defense
Black answers 1.e4 with 1...b6 and ...Bb7, hitting e4 from afar. It is offbeat and gives White an easy centre.
The Bb7 bishop pressures e4 along the long diagonal.
Black follows with ...e6, ...Nf6 and ...c5 to fight the centre.