public void CalculateLastOccupierAvailableMoves()
 {
     chessGame.board.RemoveHighlightedCoordinates();
     lastSelectedOccupierAvailableMoves = chessGame.CalculateAvailableMoves(lastSelectedOccupier);
     chessGame.board.HighlightCoordinates(lastSelectedOccupierAvailableMoves.ToArray());
 }