I think the world would likely be a slightly better place with no kings anywhere at all. I’m pretty republican in that anti-monarchy sense. But I’m not calling for violence! I just don’t believe any sort of unitary authority can safely exist, and would like all those who attempt such things to be stopped from doing so.
Rules:
Normal Sudoku rules apply.
Anti-king: Diagonally-adjacent cells do not contain the same digit.
The marked diagonals each contain the digits 1 to 9 exactly once.
Estimated difficulty: 1 out of 5
Solve on SudokuPad