I disagree with Jim's view that if there are more than 1 E horse in the race
All the E horses will use too much energy. One of them will always because only 1 horse can have the lead at any point of the race
A horse race is determined by which horse happens to be in the lead at the finish line there is no law that says all E horses get passed !
Here is the result chart
The 2 di just what it's running style said It pressed the 3 but did not
have the energy today to pass the E horse
The 7 regained its form of line 2 or 3 and won the race