What about repetitions?

1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Bd2 Bxd2+ 8 Nbxd2 d5 9 exd5 Nxd5 10 Bc4 0-0 11 Qb3 Na5 12 Qa4+ Nc6 13 Qb3 Na5...could repeat for 20 moves...