I wonder if the Dux really moved like a rook, any number of squares along files and rows. Maybe the Dux should only be able to move one square at a time, like the king in chess except for not being able to make diagonal moves.

I think the game would play more strategically that way, as the Dux would be a lot more vulnerable.

Also I think the Dux should have to be trapped in every game. Otherwise the players will just focus on capturing all the other men, and not bothering with the enemy Dux at all.