French - Swiss variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bd3
White plays the king's pawn to e4. Black moves the king's pawn to e6. White plays the queen's pawn to d4.
Black plays the queen's pawn to d5. White develops the knight to c3. Black develops the knight to f6.
White develops the light-squared bishop to d3.