Elkies 1991

1.f6 Db3 2.f7 (2.Kh6 Dd1 3.f7 Df3 4.Kg7 Dg4+ 5.Kh8 Df5 6.Kg7 Dg5+ 7.Kh8 Df6+ 8.Kg8 Dg6+ 9.Kf8 Ka4 10.Ke7 Dg7 11.Ke8 De5+ 12.Kd7 Df6 13.Ke8 De6+ 14.Kf8 Kb3 15.Kg7 De7 16.Kg8 Dg5+ 17.Kh8 Df6+ 18.Kg8 Dg6+ 19.Kf8 Kb2 20.Ke7 Dg7 21.Ke8 De5+ 22.Kd8 Df6+ 23.Ke8 De6+ 24.Kf8 Kc1 25.Kg7 De7 26.Kg8 Dg5+ 27.Kh8 Df6+ 28.Kg8 Dg6+ 29.Kf8 Kd1 30.Ke7 Dg7 31.Ke8 De5+ 32.Kd7 Df6 33.Ke8 De6+ 34.Kf8 Ke2 35.Kg7 De7 36.Kg8 Dg5+ 37.Kh8 Df6+ 38.Kg8 Dg6+ 39.Kf8 Kf3 40.Ke7 Dg7 41.Ke8 De5+ 42.Kd7 Df6 43.Ke8 De6+ 44.Kf8 Kf4 45.Kg7 De7 46.Kg8 Dg5+ 47.Kh7 Df6 48.Kg8 Dg6+ 49.Kf8 Ke5 50.Ke7 Dg7 51.Ke8 Ke6 52.Kd8 Dxf7) 2…Dd1+ 3.Kh6 Df3 4.Kg7 Dg4+ 5.Kh8 Df5 6.Kg7 Dg5+ 7.Kh7 Df6 8.Kg8 Dg6+ 9.Kf8 (9.Kh8 Dxf7 10.Sc2 dxc2) 9…Ka4 10.Ke7 Dg7 11.Ke8 De5+ 12.Kd7 Df6 13.Ke8 De6+ 14.Kf8 Kb3 15.Kg7 De7 16.Kg8 Dg5+ 17.Kh8 Df6+ 18.Kg8 Dg6+ 19.Kf8 Kb2 20.Ke7 Dg7 21.Ke8 De5+ 22.Kd8 Df6+ 23.Ke8 De6+ 24.Kf8 Kc1 25.Kg7 De7 26.Kg8 Dg5+ 27.Kh8 Dh6+ 28.Kg8 Dg6+ 29.Kf8 Kd1 30.Ke7 Dg7 31.Ke8 De5+ 32.Kd7 Df6 33.Ke8 De6+ 34.Kf8 Ke2 35.Kg7 De7 36.Kg8 Dg5+ 37.Kh8 Df6+ 38.Kg8 Dg6+ 39.Kf8 Kf3 40.Ke7 Dg7 41.Ke8 De5+ 42.Kd7 Df6 43.Ke8 De6+ 44.Kf8 Kf4 45.Kg7 De7 (45…Dd7 46.Kf6) 46.Kg8 Dg5+ 47.Kh7 Df6 48.Kg8 Dg6+ 49.Kf8 Ke5 50.Ke7 Dg7 (50…De6+ 51.Kf8 Kf6 52.Kg8) (50…Dd6+ 51.Ke8 Ke6 52.Sc2) 51.Ke8 Ke6 52.Kd8