Here's an interesting angle that produces a few winners under either code but today there are two qualifiers going...

Basically, take note of horses that are entered up in pattern class first time out & then drop out as NR's & return at some point in lower class - you could follow them until they win their maidens?

3.10 Newb - Curl, was entered in the Listed first race at York has gone for easier option.

4.30 Newm - Pink Damsel, entered also for Listed 2.10 York, again takes easier option.