Everyone expected the next big thing. A new AI model, a framework that promised the moon, or maybe just another iteration of something we’ve already seen. Instead, we got a crossword solver. And not just any crossword solver, but a Swedish one, built by a single developer, that’s quietly deploying some seriously clever SEO tactics. This isn’t about the what, it’s about the how. And the why Google should pay attention.
The Setup: Less Hype, More Humble Brag
Korsordsakuten.se is the name. It’s a free Swedish crossword solver. The creator, bless their pragmatic heart, used Astro. Forget React, forget Vue. Just Astro, SSR mode, and Node.js on Render. The core idea? A massive database of Swedish words, searchable by clue, pattern, or length. Oh, and a daily Wordle-like game for good measure. It’s the kind of project that makes you question the sanity of enterprise-level tech stacks.
The site lets you:
- Search 400,000+ Swedish word forms by clue, pattern, or length
- Filter answers by letter count (e.g. “give me 6-letter synonyms only”)
- Browse prefix/suffix indexes (words starting with SK, ending with ERA etc.)
- Solve anagrams
- Play a daily Wordle-style word game
No client-side JavaScript frameworks. Vanilla JS where it counts. This is pragmatism bordering on defiance.
The Data Deluge: OOM Errors and Lazy Loading Savior
Here’s where it gets interesting. We’re talking 18MB JSON files. 8.5MB. 6.75MB. Loading all that at module startup? On Render’s free tier (256MB RAM)? Disaster. Instant OOM crashes. The fix? Lazy loading. Simple, elegant, and utterly effective. Instead of slurping the entire words.json on boot, it’s only loaded when getWords() is actually called. It’s the programming equivalent of opening the fridge only when you’re hungry, not just in case.
They also had to boost the Node.js memory limit. Because, obviously. Forty-five thousand URLs per sitemap file? Google doesn’t play that game. They have soft limits, and this developer hit them. Hard.
Sitemap Shenanigans: The Mirror Image
Google’s crawlers are fickle. If your host goes down, even for a nap on a free tier, Google backs off. Weeks of lost SEO. The solution? A static sitemap mirror on GitHub Pages. A script pushes the sitemaps there. The URLs in the sitemap index are rewritten to point to the GitHub mirror. So even if the main site is snoozing, Google can still find its way. It’s a brilliant workaround, turning a weakness into a strength. Anyone building on free tiers should take notes. Seriously.
Schema Soup: Telling Google What You Really Are
This is where the real magic happens. Beyond just serving content, the site’s structured data is a masterclass in telling Google exactly what it’s looking at. Instead of a generic FAQPage, they’re using QAPage for clue pages. This signals to Google that each clue is a question with an answer. It’s the difference between being seen as a content farm and a genuine lexical resource. For word pages, DefinedTerm with synonyms as alternateName does something similar. It screams ‘dictionary’ to the search engine. This isn’t just about keywords; it’s about semantic clarity. It’s the kind of detail that separates the also-rans from the ones that actually rank.
Freshness Signals: The Daily Clue Hustle
Competitors have fresh content. Purely static sites struggle. Google likes things that change. So, a page called /dagens-ledtradar (daily clues) was born. It shows 24 curated clues, rotating daily. The trick? A deterministic seed. Same day, same clues. But the next day, it’s new content. No cron jobs, no database churn. Just clever math. It tricks Google’s freshness heuristic without breaking the bank (or the build process). It’s a signal of activity, a whisper to the crawler that this site is alive and kicking.
The Hard-Won Lessons: Don’t Be a Hero
Here’s the brutal truth. The free tier on Render? A liability. OOM issues? Predictable. Weeks of SEO recovery? The price of admission for trying to be too lean. The advice is stark:
- Start with a paid host. The downtime cost more than the hosting ever would.
- Plan for JSON size early. Lazy loading is great, but anticipating massive data is better.
- Submit 10 hand-picked URLs to GSC from day one. Don’t wait for the sitemap crawler to do all the work.
This isn’t just about building a crossword solver. It’s about understanding the invisible machinery of the web. It’s about making systems talk to each other, even when one of them is asleep. It’s a reminder that sometimes, the most impressive feats of engineering aren’t about the flashiest tech, but the most practical solutions to real problems.
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Frequently Asked Questions
What is Korsordsakuten?
Korsordsakuten is a free Swedish crossword solver website built with Astro. It allows users to search over 400,000 Swedish word forms by clue, pattern, or length.
Why is GitHub Pages used for sitemaps?
GitHub Pages acts as a static mirror for sitemaps to ensure Google can always access them, even if the main hosting provider (Render’s free tier) goes offline due to inactivity.
How does the daily clue feature work?
The /dagens-ledtradar page displays 24 curated crossword clues that rotate daily. It uses a deterministic seed based on the current day to generate the same clues for everyone on a given day, creating a freshness signal for search engines without complex scheduling.
