It does not matter by what distance, but as the old saying goes: The best horse wins the race.
However, in this Quiz, we are forgetting about the horse that wins, but instead actually focusing on the distance they won by? We have some Classic Winners, some Triple Crown race winners, and a couple of races which may not mean much on paper, but you may recall due to the chaos that was involved on the line.
So put your notebook and form guide aside, and see how much you can remember from some famous races from the past. We give you the horse, the winning race and even the winning year, and we want you to tell us what distance they won by.
Good luck, and remember to tweet us @TWEnclosure, with your result.