Concerning Spartan Chess
From the Author / Inventor
A computer was used. Over 1300 games were played on the version 1.09 and changes to the pieces were made between 1.08 and 1.09 to balance the game. H.G. Muller's modified his fairy chess engine to play Spartan Chess which has unusual rules with perhaps the most unusual the Spartan's having 2 Kings.
You might check his and other comments on the Spartan page and the Spartan thread in the general comments section concerning testing and balance.
We play it every week here in San Diego. If you can proved it not balanced please do. So I have a barrel of manure waiting :)