HalfPawn: SMIRF is a program that plays Chess and some Chess variants such as Embassy Chess, Capablanca Chess, Janus Chess, and Capablanca Random Chess (CRC). I believe it no longer supports Gothic Chess. He too had a falling out with the patent holder of Gothic Chess. He goes by SMIRFengine on this site. There's also a Colonel Cricket on this site.

Reinhard is the guy's name that has SMIRF. He has a website that tells you about SMIRF and some of the larger board Chess variants. One of the pages deals with assigning strength values to the pieces on a 10 × 8 sized board. A few people have different ideas about it and how the pieces might change in strength as a game progresses. This is to help one decide if it's wise to trade a Bishop for Knight. It's not always straight forward thing in regular Chess even if most people use the P=1 N=3 B=3 R=5 Q=9. The larger board makes some pieces worth less in value to others, so the positioning of the piece greatly affects its value. And then there's the newer pieces themselves. As a Queen is valued more than the two pieces it can move as, the Marshall and Cardinal can have this too.
http://www.chessbox.de/Compu/schachveri1_e.html

If you can read German, you should use that site's links for that. Reinhard's native tongue is German.