Think I may be missing something in the last stage. I think I have identified the cell to change. But I have two (consecutive letter) options as to what to change it to.
I can change it to be consistent with the others, but then I don't see why it's 'fit for a king or queen'. Or I can change it to a different letter, which would produce something 'fit for a king or queen', but then it's not what it's supposed to be?
Am I missing something more elegant?