Hi Aine,
A Rule 4 is a perfectly normal thing to happen on Horse Racing. It is a deduction for when a runner comes out of the race meaning that your odds should change. It makes sense. Imagine Frankel was a non runner, the other horses odds would change massively! A Rule 4 accounts for this.
So for example when a non runner happens the Rule 4 applies as follows:
Odds |
Deduction |
1/9 or shorter |
90p (in £) |
2/11 to 2/17 |
85p |
1/4 to 1/5 |
80p |
3/10 to 2/7 |
75p |
2/5 to 1/3 |
70p |
8/15 to 4/9 |
65p |
8/13 to 4/7 |
60p |
4/5 to 4/6 |
55p |
20/21 to 5/6 |
50p |
Evens (1/1) to 6/5 |
45p |
5/4 to 6/4 |
40p |
13/8 to 7/4 |
35p |
15/8 to 9/4 |
30p |
5/2 to 3/1 |
25p |
10/3 to 4/1 |
20p |
9/2 to 11/2 |
15p |
6/1 to 9/1 |
10p |
10/1 to 14/1 |
5p |