English - London defensive system
1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. g3 Bf5
White moves the c-pawn to c4. Black advances the c-pawn to c6. White develops the knight to f3.
Black pushes the queen's pawn to d5. White plays the b-pawn to b3. Black develops the knight to f6.
White pushes the g-pawn to g3. Black develops the light-squared bishop to f5.