chessboard.cs

        static void DrawChessboard(int width, int height)
        {
            // iterate each y
            for (int y = 0; y < height; y++)
            {
                // iterate each x
                for (int x = 0; x < width; x++)
                {
                    // on pair y, draw black odd x
                    if (y % 2 == 0)
                    {
                        if (x % 2 == 0)
                        {
                            // set white
                            Console.BackgroundColor = ConsoleColor.White;

                        }
                        else
                        {
                            // set black
                            Console.BackgroundColor = ConsoleColor.Black;

                        }
                    }
                    else
                    {
                        if (x % 2 == 0)
                        {
                            // set black
                            Console.BackgroundColor = ConsoleColor.Black;

                        }
                        else
                        {
                            // set white
                            Console.BackgroundColor = ConsoleColor.White;

                        }
                    }
                    // draw the cell
                    Console.Write(" ");
                }
                // end of a line, go below
                Console.WriteLine();
            }
        }