The past few months I was working on a fun project which basically uses the traditional chess pieces and their move sets. On top of that I added Sudoku limitations to restrict movements. In order to make that work I also changed the board size to 9x9. In the following images you can see an example of how the restrictions affect the movements of bishops. Note how either of the bishops can't be in the same 1) row 2) column and 3) square as the other one:
Now, finally, my question: Can anyone think of a good initial setup for all pieces? The traditional chess setup obviously doesn't work here thanks to the Sudoku restrictions.
To make this answerable: the accepted answer will be the one closest to the traditional setup.
On the one hand, I'd like to keep it as close as possible to the traditional setup. On the other hand, feel free to bring in your own ideas. Anything is possible! (Even placing pieces on the opponent's side of the board or multiple queens. Just saying...)
The one exception: there can only be 1 king of course (or maybe not?).