6...exd4 7.0-0! Morphy vs NN, 1858  (C55) Two Knights Defense, 23 moves, 1-0 E Schiller vs Busch, 1970  (C57) Two Knights, 11 moves, 1-0 Schroder vs H Illgen, 1926  (C55) Two Knights Defense, 13 moves, 1-0 6...f6 7.d4xe5 K Williams vs D Vecanski, 2000 (C57) Two Knights, 20 moves, 1-0 4 games