To cite package ‘pprules’ in publications use:

  Davis T (2024). _pprules: Piecepack Game Rules_. R package version
  0.1.0-1, <https://github.com/piecepackr/pprules>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pprules: Piecepack Game Rules},
    author = {Trevor L Davis},
    year = {2024},
    note = {R package version 0.1.0-1},
    url = {https://github.com/piecepackr/pprules},
  }