Race Comment Explainer

Original comment with matches highlighted:

dwelt, always towards rear, er halfwa, struggling soon after , from 2f out

Matched phrases & meanings

Phrase	Meaning
Towards rear	Running near the back of the field.
tailed off	A definitive statement that the horse was finished and effectively out of the race
Ran green	Inexperienced or showed signs of immaturity.
halfway	The horse was patiently ridden up to the middle point

Summary

Running near the back of the field.
A definitive statement that the horse was finished and effectively out of the race
Inexperienced or showed signs of immaturity.
The horse was patiently ridden up to the middle point