Pocket Card Jockey - Won the King's Gate G1 Race.
To explain how difficult this is, in this game your horses have stats that you train while the horse is young only (with their max stats typically reaching from 80-100). This horse I had was trained to 102 Speed and 120 Stamina (Speed being the main factor at end of race scenario's, Stamina just being if you survive the race until then).
Typically in this game you can beat horses that are of a higher speed than you, but you have to do really well in your solitare games. Basically, it gets really difficult simply racing a horse who has a speed 30+ your speed unless they fail.
The horses in the King's Gate have a speed typically around 150 each, which is 50+ mine, and the best rider had 180 speed, which was basically 80+. So Basically, I just beat an impossible race (was absolutely perfect and I literally only won by a hair).