H. G. Muller wrote on Thu, Jun 30, 2011 07:08 AM UTC:
> @Christine: Unfortunately, I do not even own an operating system
> necessary to run Zillions of Games; therefore I cannot make
> and test zrf files.
On the other hand, Fairy-Max is available under Linux, and because the Knaves and Debtors are regular Chess pieces, would be trivially able to handle it.