Ask HN: Hacker News no longer showing on Google.

I don't know what has happened but googling Hacker News doesn't show hacker news on the front page anymore.

I think Google may have made an algorithm change because it seemed interesting to note the highly ranked pages had hacker news directly in the url (instead of news.ycombinator etc). Even the wikipedia entry is ranked higher.

I had a thought that was kind of amusing. pg has intentionally hidden HN from search engines to avoid the flood of new users and preserve the quality of the site.

I was wondering why is this happening?