Big ass problem: Found one, where a the first good solution is a must have for nearly everyone in the world with Internet access.
"Hard tech" solution: A bunch of applied math, with advanced prerequisites, some original, for a unique, really good, fun to use, interactive and addictive, by far the best in the world solution -- Did that.
"Hard"? Silicon Valley has more hen's teeth than entrepreneurs who could understand the theorems and proofs of my math even if I explained it to them. Why? They didn't take the prerequisite pure/applied math courses in grad school. Neither did more than a tiny fraction of computer science profs.
Code: 80,000 lines of typing, running, in alpha test -- did that.
"We hope to hear from you."
You did, and you ignored it.
Using my HN UID, look up my submission in your records. If you are interested now, then let me know.