Larry Smith wrote on Sun, Jun 17, 2007 07:20 PM UTC:
Check out Emperor Raumschach.
It is a variant of mine which attempts to answer several of the obstacles of Raumschach.
The Emperor piece guarantees a checkmate position. While the Herald(Unicorn+Knight or Unicorn+Hippogriff or Unicorn+Wyvern) frees up the simple Unicorn from its triagonal pattern.
There's a Zillions implementation for those who wish to evaluate it themselves.