Race Comment Explainer

Original comment with matches highlighted:

took keen hold, chased leaders, next, no ext 3 out, mistake next, from 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.
Keen	The horse was fighting the jockey, wasting energy early.

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 was fighting the jockey, wasting energy early.