Sounds interesting. I wonder, what if one, or both, of the two princes is a Desert King, so to speak (A combination of the desert Wazir and the desert Ferz.)
Knights could also move like the Chinese Mao, but capturing an enemy piece if it happens to be orthogonally adjacent, and they can capture multiple piece at the same turn.
I would like to try the game as it is here. I'll wait for the preset.