Question

Refine the program for solving the cight queens problem so that the solutions are written to an HTML. file, using tables with black and white background for the board and the Unicode character " " "lu2655" for the queen.

Short answer

Create HTML with CSS for chessboards and a function to output solutions using Unicode queens.

Step-by-step solution

Initialize HTML Document

Begin by initializing the structure of an HTML document. Include the basic HTML tags such as ` `, ``, ``, and ``. Inside the ``, add a `

Set Up CSS for Chessboard

Within the `

Create a Function for HTML Output

Write a function in your program to generate the HTML content. This function should create an HTML table to represent a chessboard, using the appropriate CSS classes for each square based on its row and column indices (i.e., alternate colors). Use the Unicode character $\text{u}2655$ to represent a queen.

Implement Eight Queens Logic

Implement or refine the logic to solve the Eight Queens problem. This can be done using backtracking, where you recursively place queens on the board and backtrack when conflicts arise, ensuring no two queens threaten each other.

Generate Board for Each Solution

For each solution generated by the Eight Queens logic, call the HTML function to create a chessboard representation. Alternate between black and white backgrounds by checking if the sum of row and column indices is even or odd.

Save Solutions to HTML File

Finally, write the generated HTML content to an HTML file. Use Python's file handling to open a file with write access and output the entire document string, ensuring that all CSS styles and tables are included for each solution.

Key concepts

HTML Document Generation

Creating an HTML document is a fundamental skill for any web development task. To start an HTML document, you need to include some basic tags to define the structure. These tags are essential for the browser to understand and render the content correctly.

Start with the `` declaration, which informs the browser about the HTML version being used, ensuring it processes the document correctly. Follow this with the ``, ``, and `` tags.

The `` section is where you place metadata about the document, like styles or scripts, using `