i had to edit my rating because i did not fully understand your rules
earlier, i think it is a pretty interesting variant too, making unique
situations. there is also another variant in ancient chaturanga with the
idea in 'all vs all' of taking over the army of the king you capture,
but first you must place the king you capture, from off board, in to a
zone, your or their starting position, i forget. that variant is
interesting too.
pretty cool game you got here i think.