This is a selfpost, and selfposts are automatically penalized.

I.e. it's an invalid comparison, because the #2 item is a link to a URL, whereas this post isn't. Selfposts require many more votes to keep pace with URL submissions.

I've been on HN for much longer than your 2-month old account and (based on the ranking of other "Ask HN" and "Show HN" posts I've seen), I suspect that you're speculating and that your assertion is incorrect.

The huge inconsistency between points and ranking happen on a large number of Microsoft-related posts and almost all of them point to external websites.

[update:Reply to LukeShu] Thanks LukeShu, it is good to know how ranking is implemented.

Btw I didn't question whether the absence of URLs reduced the ranking or not. My question was whether the absence of URLs was the only reason (or at least the primary reason) for the push-down of this specific post.

It seems clear that the .4 multiplication rule could not have been the only reason.

As per the .4 multiplication rule, the post with 290 points should have been downgraded to 116 points. Yet, 4 hours after submission, it was at #8. The #2 post only had 90 points and had been submitted 5 hours earlier. So it seems like the push-down was partly caused both by the 0.4 rule and partly by other factors.

Anyway, I appreciate your investigation. In spite of being on HN for the past few years, I never knew that posts without a URL, got hit by this 0.4 rule.

HN's ranking algorithm[1] (as of 2010-10-12):

    (= gravity* 1.8 timebase* 120 front-threshold* 1
       nourl-factor* .4 lightweight-factor* .17 gag-factor* .1)

    (def frontpage-rank (s (o scorefn realscore) (o gravity gravity*))
      (* (/ (let base (- (scorefn s) 1)
              (if (> base 0) (expt base .8) base))
            (expt (/ (+ (item-age s) timebase*) 60) gravity))
         (if (no (in s!type 'story 'poll))  .8
             (blank s!url)                  nourl-factor*
             (mem 'bury s!keys)             .001
                                            (* (contro-factor s)
                                               (if (mem 'gag s!keys)
                                                    gag-factor*
                                                   (lightweight s)
                                                    lightweight-factor*
                                                   1)))))

I think pg thinks there is a problem, and is almost surely willing to admit it.

I think he just doesn't see a way of solving it that doesn't involve the discussions here on HN becoming flamewars... Which is also a serious problem...

This looks to me very much like a doctor prescribing a drug with unfortunate side effects. You still do it, but you're also keeping an eye out for new drugs that don't cause as many headaches.