Race Comment Explainer

Original comment with matches highlighted:

chased leaders, 3 out, on 6th, and no impr 3 out, and no impression from after 2 out

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).
not fluent	The horse jumped the tenth fence/hurdle poorly or awkwardly
One pace	The horse maintained its speed but could not accelerate or quicken.

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).
The horse jumped the tenth fence/hurdle poorly or awkwardly
The horse maintained its speed but could not accelerate or quicken.