Ben Reiniger wrote on Mon, Oct 14, 2013 10:35 PM EDT:
See the Developer Guide:
http://play.chessvariants.org/pbm/devguide.html
in particular the section called Editing a Preset.
I'm not sure if one can get a clean slate preset; it's best to find a game somewhat similar to yours and edit that preset into one for your game. It's fairly easy to get a preset setup to play most games, but getting the preset to check rules can be more difficult; most presets available here don't check rules (as far as I know).
See the Developer Guide:
http://play.chessvariants.org/pbm/devguide.html
in particular the section called Editing a Preset.
I'm not sure if one can get a clean slate preset; it's best to find a game somewhat similar to yours and edit that preset into one for your game. It's fairly easy to get a preset setup to play most games, but getting the preset to check rules can be more difficult; most presets available here don't check rules (as far as I know).