Race Comment Explainer

Original comment with matches highlighted:

chased leaders, n on until n over 2f out, until inside last

Matched phrases & meanings

Phrase	Meaning
Chased leaders	Running directly behind the horses in front of the field.
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
No extra	Did not improve or accelerate when asked.
Ran on	The horse maintained or increased its speed in the final stages.

Summary

Running directly behind the horses in front of the field.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Did not improve or accelerate when asked.
The horse maintained or increased its speed in the final stages.