I will chime in a little bit here on a non-sheet related response.

The sport is designed to bring together in each race horses who are closely aligned in ability. The list of proposed upcoming races is called the condition book. The reason is that "conditions" are the filters that set forth horses' eligibility to run in each race. There are many different sorts of conditions/filters (age, sex, state of breeding, number of wins, horse's value, owner's willingness to put up money to enter, differing assigned weights), but the entire point of all of them is to make open and competitive races....because that is what makes people interested in betting....and ....without betting...there are no races. So, by design, the races are supposed to be evenly matched.