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Gridmino

Play free daily logic puzzles in your browser: NumberLink, Masyu, pentominoes, word and number games. A fresh set every day. No app, no sign-up.

Games

Added July 20, 2026 · Last analysed July 20, 2026 · via Hacker News · 62% unique tagline

Own this Launch?
Screenshot of Gridmino

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 20 July 2026; the live site may have changed since.

Gridmino scores highly overall, with a thorough launch checklist, fast page loads, and clean crawl signals. Main gaps: no Content-Security-Policy, incomplete legal pages, and incomplete email security.

Launched on Hacker News on July 20, 2026. The site is hosted on Hetzner Online GmbH in Germany, with a domain registered 3 weeks before launch. We've detected 8 technologies on this site, covering analytics, developer tools, DNS providers, and frameworks. The stack includes Svelte, Google Search Console, and HSTS.

It's one of 39 launches on this exact stack and more locked down than the typical Hacker News launch.

If you own this site, refresh the snapshot and see the full fix list any time →

8.5
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
5/6 Security Headers
Strong
2/3 Legal
Partial
2/2 Crawl files
Complete
100/100 Performance
Fast
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (8)

Infrastructure
DNS Namecheap DNS
Protocol HTTP/3
Security HSTS
Server nginx
Build & Framework
Developer tools Vite
Framework Svelte
Analytics & Marketing
Analytics Umami (2)
SEO Google Search Console

Infrastructure

Network
HETZNER-AS - Hetzner Online GmbH, DE
AS24940 · DE
DNS
Namecheap DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 23 Jun 2026 to 21 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
27 days
Registered Jun 2026 · NameCheap, Inc.

Email Security

✗
SPF Not published. Your domain can be spoofed in phishing emails.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC p=none None (p=none). Monitoring only.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (1)

Local storage (1)
KeySizeDetected as
puzzle-theme 4 B -

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)

Performance How?

32 ms Server response
100% Faster than peers
240 ms Largest contentful paint
0.00 Cumulative layout shift
197 KB Page weight
12 KB Image weight
2 Third-party domains
0 Console errors
0 Failed requests

⚠ 17 images: 17 without width/height

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (19 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
✓ Terms of Service
/play/pentostars
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).

Security Headers (5/6)

✓
Referrer-Policy
✓
X-Frame-Options
✓
Permissions-Policy experimental (check browser support)
✓
X-Content-Type-Options
✗
Content-Security-Policy
✓
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

2 JS files
1 CSS files
2 Third-party domains

Brand Colours

App Manifest

Gridmino — Daily Logic Puzzles
display: standalone 3 icons
theme #11131c
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.