Basic concept:
A program that checks Betfair's current day football coupon, compares the list of games against two (2) user input criteria, displays the result and alerts the user if a match is made.
I am not sure of the method that is easiest to achieve the desired result because I don't know how calls made to Betfair can be filtered. I have included a way that may work, but am open to suggestions.
The complete rules and a diagram are on the attachment.
Please Note: This is a fairly easy bit of programming for someone who already knows how to work with Betfair's API. Please, only bidders reply that can do this for less than $100