Not much chance at this point, as I don't understand the promotion rules at all. You have both promotion on capture and promotion in a zone, and for the latter different rules for last rank and other ranks?
You confirmed what I thought about it: never mind the Hia power rules, the promotion rules are too much for a Diagram!
The Pawns and Berolinas promote from the Zones (first to unpromoted pieces, second to first-promotions); Guards only by capture; other unpromoted pieces by either capture or the first zone; and first-promotion only by capturing other promoted pieces. That's a lot for any generic system to try to be able to handle.
You confirmed what I thought about it: never mind the Hia power rules, the promotion rules are too much for a Diagram!
The Pawns and Berolinas promote from the Zones (first to unpromoted pieces, second to first-promotions); Guards only by capture; other unpromoted pieces by either capture or the first zone; and first-promotion only by capturing other promoted pieces. That's a lot for any generic system to try to be able to handle.