What It Means
This code appears in the Plainridge programs without an accompanying key, and its parts do not map onto the standard abbreviations with enough confidence to spell out a full reading here. What can be stated is how it was used, which is set out below from the races themselves.
In the programs held here 4YOS was carded 7 times for the pace (7), carrying purses from $4,000 to $5,000. The first appearance in this record is May 12, 2003 and the last is Jul 21, 2003, which gives a rough sense of how long the racing office kept the condition in rotation.
Conditions like this one are the machinery that keeps a small meeting competitive. Rather than grading horses by an official rating, the secretary writes an eligibility sentence and lets the entries sort themselves out. A card at a regional track therefore carries far more distinct class codes than an outsider would ever expect to find.
Race Days Carrying This Condition
Questions about this condition
What did 4YOS pay?
Purses of $4,000 to $5,000. Purse is the money on offer for the race, split by finishing position, and it is the most reliable indicator of where a condition sat relative to the rest of the card.
When did 4YOS last appear on a card?
2003-07-21, having first appeared on 2003-05-12. Both dates come from the surviving documents for those days.
What does the class code 4YOS mean?
A condition code as the racing office wrote it. The parts of this one cannot be decoded with confidence from the surviving sheets, so the page shows how it was actually carded rather than guessing at a reading.
How often was 4YOS carded?
7 races in the recovered record, 2003-05-12 to 2003-07-21. That is a count of surviving charts and entry sheets, so it is a floor rather than a total.
Was 4YOS raced at the trot or the pace?
Only at the pace — all 7 races.