No, simply because HN doesn't have the culture of "Here's a problem, let's collaborate on it". We're much more likely to discuss the problem itself and discuss the pros and cons of different approaches.
If you ask for help with a specific problem you'll probably get it, but I don't think there's the same viewpoint that if a puzzle is posted we need to solve it as a collective as quickly as possible.
If you post on HN about a problem, you'll likely get 1 useful answer and 6 answers pointing out that your problem is symptomatic of a wrongheaded approach and you should be doing something else instead :)
If you ask for help with a specific problem you'll probably get it, but I don't think there's the same viewpoint that if a puzzle is posted we need to solve it as a collective as quickly as possible.