Please don't do this. Google is already useless enough as is. New HN comments get indexed in like five minutes, but then they're gone in a month or two. Same with all content lately, it gets indexed really fast and then it's gone. It's gotten to the point where I'm looking for stuff I know exists and I know the keywords used on the page, and I still can't find it because Google just doesn't index that page anymore even though it's relatively popular. (For what it's worth, I was looking for a lecture that IIRC was submitted here a while ago that was basically a defense of pure math research in university.)
I actually used Yahoo! this week for the first time in a decade because Google just doesn't return good results anymore.
I agree. I haven't used Google for months. It's so web1.0 It's not even in the cloud. It's in datacenters! Google stopped being relevant the moment twitter burst onto the scene with its paradigm shifting earthquake. Everyone I know now just tweets people asking for stuff instead of using google. That way you get 'realtime' results - also Twitter is immune to spam or gaming. It's impossible. Either that or they go straight to WolframAlpha which has largely killed off Google in recent days.
HN was not designed with SEO and linkage in mind -- after a while pages can become "orphaned" after they get pushed down by new stuff. No search engine follows all links. As a practical matter they generally give up after 6-8 links away from the home page.
I actually used Yahoo! this week for the first time in a decade because Google just doesn't return good results anymore.