Desktop only pages accessible from phone

[prathmesh-ka-github]

This issue was detected after a link was shared for 4-player chess page, which is a desktop only part of the application got accessible from a mobile phone.

After testing this behavior more, users can just add the link for 4-player chess page manually and system wont detect the user's devices after the choose screen where users choose between 2-player and 4-player chess.

Need more validation on other pages, not just the choose page.