The reference to pieces being ‘bound’ to columns remains in the Rules section; it's more‐or‐less clear from context what you mean but since that word has an established technical meaning (being unable to leave a region as a consequence of one's move, as of e.g. a Bishop) it'd be clearer to avoid it entirely. In any case that sentence adds little more than linking with the name; ‘associated with’ would be quite clear.
It would probably be clearer to fold the statement about the e file into the subsection about Ranks 3–7 as another bullet point, rather than giving it a separate subs'n. Which would also allow you to get rid of the exception notice
The reference to pieces being ‘bound’ to columns remains in the Rules section; it's more‐or‐less clear from context what you mean but since that word has an established technical meaning (being unable to leave a region as a consequence of one's move, as of e.g. a Bishop) it'd be clearer to avoid it entirely. In any case that sentence adds little more than linking with the name; ‘associated with’ would be quite clear.
It would probably be clearer to fold the statement about the
efile into the subsection about Ranks 3–7 as another bullet point, rather than giving it a separate subs'n. Which would also allow you to get rid of the exception notice