[Ygorl]

Good point. I was worried about being stuck unable to attack a province that bordered on a crowned province without knowing whether or not it was a capital. Your solution works beautifully, however (it's not important to know which nation's capital a province is, only that it is *some* nation's capital - a subtlety that had escaped me when I posted my request). Thanks for helping out this old and unimaginative wyrm!