This might be worth looking at--if anyone could access past results through a database would be greatly appreciated.

1/ Operate only on Metropolitan meetings--no maiden races or jumping races

2/ Runner must have started in the last 21 days

3/ Runner must have run placed last start

4/ Eliminate any who have won last 2 starts

5/ Runner must have won over distance of today's race--allow 50 metres either side

6/ Runner must have won at track

7/ Runner must have win S/R of at least 25%--runner must have had 8 or more starts

8/ If 3 or more runners left, ignore race.