Rule 1: Eliminate jumps races.
Rule 2: Up in weight from its last start.
Rule 3: 2YO or 3YO colt and gelding.
Rule 4: Last start <= 21 days.
Rule 5: Pre-post favourite.

This system was obtained from the website www.horseracingsystems.net and the comments for the systems were as follows: "The system is based on the fact that horses carrying a weight penalty still perform very well. The effect of weight on a horse is not as severe as people think, especially if the horse is young, male and fit. This system takes advantage of that fact. This system has been developed by analysing flat races, and so should only be applied to horses taking part in flat races."