Scotch - Potter variation
1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3
White advances the king's pawn to e4. Black plays the king's pawn to e5. White develops the knight to f3.
Black develops the knight to c6. White plays the queen's pawn to d4. Black captures on d4 with the king's pawn.
White captures with the knight on d4. Black develops the dark-squared bishop to c5. White jumps the knight to b3.