Parsing a Flat SGF String (with the Package listofitems)

I'm trying to parse an SGF string with the package listofitems. SGFs are trees in text form, but right now, I'm working on only single-branched SGFs, for simplicity.

Here's an example of what I'm trying to do:

\documentclass{article}\usepackage{listofitems}\usepackage{tikz}\newcommand{\parseSgf}[1]{  % From [this answer by @StevenB.Segletes](https://tex.stackexchange.com/a/429895/64441).  \setsepchar{;}  \defpair{[]}  \readlist\Z{#1}  \begin{itemize}    \foreach \i in {\Z}{      % TODO: if key is either `B` or `W`:      \item Color: {\i}[0] and Coords: {\i}[1]    }  \end{itemize}}\begin{document}  \def\sgfA{;B[ab];W[cd]}  \def\sgfB{(;GM[1]FF[4]CA[UTF-8]AP[Sabaki:0.52.2]KM[6.5]SZ[19]DT[2024-02-05];B[as];W[bs];B[cs])}  \parseSgf{\sgfA}  \parseSgf{\sgfB}\end{document}

sgfA isn't proper SGF, just a simple example. I would like it to print an unordered list like this:

• Color: B and Coords: ab
• Color: W and Coords: cd

But I haven't been able to figure out how to use \setsepchar and \defpair to separate things properly, or how to use them in a \foreach.

sgfB is a proper SGF string. And there's the additional problem of ignoring keys that are not B or W. If anyone knows how to do it with listofitems, that would be a plus.