English - three knights system
1. c4 e5 2. Nc3 Nc6 3. Nf3
White moves the c-pawn to c4. Black moves the king's pawn to e5. White develops the knight to c3.
Black develops the knight to c6. White moves the knight to f3.
White moves the c-pawn to c4. Black moves the king's pawn to e5. White develops the knight to c3.
Black develops the knight to c6. White moves the knight to f3.