Race Comment Explainer

Original comment with matches highlighted:

chased leaders, led 4 out, headed ho 3 out, ridden and headed ,

Matched phrases & meanings

Phrase	Meaning
Chased leaders	Running directly behind the horses in front of the field.
not fluent	The horse jumped the tenth fence/hurdle poorly or awkwardly
Stayed on	Continued to finish but without closing the gap significantly.
home turn	This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
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 horse jumped the tenth fence/hurdle poorly or awkwardly
Continued to finish but without closing the gap significantly.
This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
The horse maintained its speed but could not accelerate or quicken.