Race Comment Explainer

Original comment with matches highlighted:

towards rear, 8th ut, wen, progress into 4th 2 out, went 3rd after last, kept on one pace run-in

Matched phrases & meanings

Phrase	Meaning
kept on one pace run-in	The horse maintained its existing speed through the final run to the finish line, but could not accelerate or quicken relative to the leader.
Towards rear	Running near the back of the field.
halfway	The horse was patiently ridden up to the middle point

Summary

The horse maintained its existing speed through the final run to the finish line, but could not accelerate or quicken relative to the leader.
Running near the back of the field.
The horse was patiently ridden up to the middle point