English - Caro-Kann defensive system
1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2
White moves the c-pawn to c4. Black pushes the c-pawn to c6. White develops the knight to f3.
Black pushes the queen's pawn to d5. White advances the b-pawn to b3. Black develops the knight to f6.
White develops the dark-squared bishop to b2.