Race Comment Explainer

Original comment with matches highlighted:

chased leaders, impression over 2f out, no impression on winner from over 1f out,

Matched phrases & meanings

Phrase	Meaning
no impression on winner	The winner was clearly superior in the final stage.
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).
One pace	The horse maintained its speed but could not accelerate or quicken.

Summary

The winner was clearly superior in the final stage.
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 maintained its speed but could not accelerate or quicken.