Working through the bits, following Q/N/R. The reason for the A-H thing was just since I wanted to indicate all the pawns and seemed a fair way to do it. I like including daft mechanisms in my stuff, though, so maybe that is just an excuse.
P
Sort:
P
Ahead of the mighty pieces,
Begin eight pawns, on second row.
Cautious moves then create niches;
Dashing charges bravely will go.
Expansion leads to the foes half;
Further to sixth rank they march down;
Great risk as seventh meets their path.
Home safe, the last step yields a crown.