M Winther wrote on Fri, Mar 26, 2010 06:24 AM UTC:
It is true, the 'bishops' are in fact alfils, namely pieces that jump two steps. So Murray must be wrong. Otherwise the bishops have no chance to be active, other than being exchanged along the diagonal. I have implemented Four Seasons Chess with alfils here:
http://hem.passagen.se/melki9/4shatranj.htm
(It now plays a good game).
/Mats