English - symmetrical variation
1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6
White pushes the c-pawn to c4. Black moves the c-pawn to c5. White develops the knight to f3.
Black develops the knight to f6. White moves the queen's pawn to d4. Black captures on d4 with the c-pawn.
White captures with the knight on d4. Black pushes the king's pawn to e6.