Chess Sudoku

Chess Sudoku is a simple and calm, but somewhat challenging puzzle game. As you will expect from the name, it is based on the well-known games Chess and Sudoku. The main goal is to solve a Sudoku, but the only way to fill in the numbers is by moving a chess piece to the correct field. Every chess piece has a number and a color attached to it, and if it is moved to a spot with the correct matching number, the field gets filled with that number. By also matching the correct colors you get a bonus. There are 4 of the known chess pieces: King, Knight, Bishop, Rook (Tower). The King and Knight move just as in chess. The Bishop and Tower, however, can sometimes only move 2 fields at a time, jumping over the one field in between. The Chess pieces are positioned on additional grids, outside of the main Sudoku grid....