I just had to google a bunch of races that I wanted to run. The top result was always the event's own web site.
When I google some news, relevant news articles always come up.
The last search I did was for how to display a ket vector in LaTeX. The top result was the StackExchange article with the right answer.
From what I see, certain domains seem to be targeted for exploitation. Programming questions seem to be high up on the list. I wonder if that skews HN readers' perceptions.