I feel if one shared a system that worked over time , a punter would instinctivly change the rules to to try & improve on it.

The other thing is discipline, not many Punters posses this trait.

This will be seen when the system has a run of outs, which is normal for most plans of attack, this usually rattles most punters , so they usually stop using it.

Put the 2 together & I dont feel the system would ever be over bet, because over time it wont look anything like the original.

Here is an example.
.Target the 3 pre-post Favs in any newspaper or racingandsports & highlight the one that has the best chance of loosing the race.
These 3 generally win 45-55% of all races

. 1300m & more.

.12 runners & less.

.Now that you have worked out who the worst horse is, bet it to win.

I doubt if this idea will ever be over bet.

But to prove to oneself if it can work, start Lay betting each selection & see just how much money one will loose.

The reasoning is , if it is winning logic that is used to select a winner & they dont show a profit, the reasoning is, if one reverses the thought process , one should be in profit.

Cheers.

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Cheers.