Has there been a change in racing or has the increase in computers just changed the results? Has the increased access to computing power made the sure things much more surer or accessible and destroyed the value?

I have recently purchased Bet Selector. With it came 107 free systems. Great or so I thought. I got the data base to Oct 2007 and downloaded the TAB files. And tested. All systems together showed a loss on turnover. So i tested individually.

Some i noticed had good results for 2009 but over 27 months bombed out. I kept these. One gave excellent place results, two have good consistent first four results and one gave good exacta and trifecta values.

All in only 31 systems survived the cut. Only 27 that you would put win bets on. All 27 combined give a 12% POT (I tested the 31 plus 2 that i culled later and adjusted)

So that means that 76 systems with were viable at inception and remained so for some time are no longer viable. I am only going to shelf them for now.

The question remains "Why are they no longer viable?" Is it cyclic? 5 of the saved systems had good 2009 season and disasterous 2008. If I had not noticed the trend they too would be shelved.

Is it because the selections are the obvious selection and overbet. Is this more people betting or the same people betting more because their banks have risen? Which brings the question about the validity of the results.

The program does not allow for the effect of a real bet being placed. What is the effect to the POT if $10 bets are placed (not much) but what if $100 bets are placed or even $1000 bets (10 people betting $100). This would substancially alter the POT

The effect could really be seen in the first four result. 20/10/2007 MR9 #15 is accredited with a $112388 first four divvy. The divvy was picked up by 2 systems. This makes a 80% POT. If these two systems were on then the divvy would have been altered.

The moral is that just because you have a system that worked and maybe still works, it may not be working now or it may not work tomorrow.

Regards Beton