Race Comment Explainer

Original comment with matches highlighted:

pressed leader, r 1f out, so 2f out, led over 1f out, soon ridden and asserted,

Matched phrases & meanings

Phrase	Meaning
Led over 1f out	The horse took the lead with about one furlong (200m) to go.
Pressed leader	Applied pressure to the horse in front.
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Ran on	The horse maintained or increased its speed in the final stages.

Summary

The horse took the lead with about one furlong (200m) to go.
Applied pressure to the horse in front.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
The horse maintained or increased its speed in the final stages.