I understand your points. If there was 1 BN on b1/b12 and 1 RN on k1/k12 only, all your specs would be respected: all pieces can move behind the lines, all pawns are protected, the Cannons keep their mobility. Just there is no symmetry for BN and RN, but there is no symmetry for Queen either and this is not illogical. I have understood that the reason why you had 2 BNs,2 RNs is because you owned 2 physical Gothic chess sets. An option to play with a single BN/RN set would be worth to consider maybe. Just wondering.
I understand your points. If there was 1 BN on b1/b12 and 1 RN on k1/k12 only, all your specs would be respected: all pieces can move behind the lines, all pawns are protected, the Cannons keep their mobility. Just there is no symmetry for BN and RN, but there is no symmetry for Queen either and this is not illogical. I have understood that the reason why you had 2 BNs,2 RNs is because you owned 2 physical Gothic chess sets. An option to play with a single BN/RN set would be worth to consider maybe. Just wondering.