Vienna - Mengarini variation
1. e4 e5 2. Nc3 Nf6 3. a3
White advances the king's pawn to e4. Black advances the king's pawn to e5. White develops the knight to c3.
Black develops the knight to f6. White plays the a-pawn to a3.
White advances the king's pawn to e4. Black advances the king's pawn to e5. White develops the knight to c3.
Black develops the knight to f6. White plays the a-pawn to a3.