Iv’e taken a look at your code and I see where you might be getting some errors. You’re not passing test 6 because your nav headings and main headings don’t match when underscores _ are ignored by the testing script so go ahead and match those up in terms of case and syntax, same spelling, same font letter sizing, etc. Another proplem I saw was this:
!!There is no main-section for this nav element!!
I commented it out as I tinkered with your code, you have a nav link pointing to nowhere, so either add a “chess websites section to your html” or remove that nav link like I did. Next your are not pasing test 7 because there are not enough List items in your html body so add some more into your “sections”, you need at leat 5 or more in total. Lastly your nov should be programmed to be fixed to the top on smaller screens, something you can acomplish using media queries ==> https://codepen.io/ShefroyRowe/pen/dyOQOaz <== view my page to see how I did it. Hope it all works out, blessings.