Number Duel

Pick a number, claim the matching sum, and connect four before your opponent sees the line.

numberduel.mathmindpuzzles.com · Added June 10, 2026 · Last analysed June 10, 2026 · via · 75% unique tagline

Own this Launch?

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 10 June 2026; the live site may have changed since.

Number Duel has the basics covered well, with a thorough launch checklist, fast page loads, and clean crawl signals. What needs work: missing several security headers, incomplete legal pages, and no email security records.

Launched on Product Hunt on June 10, 2026. The site is hosted on Cloudflare in the United States, with a domain registered 1 week before launch. Our crawler found 4 technologies on this site, covering analytics, build tooling, CDN, and protocol. The stack includes Vite, Cloudflare, and Cloudflare Web Analytics.

Notably, it's running the same core stack as 712 other launches.

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

6.2

StackScope Score

Good

100/100 Launch Readiness

Launch ready

0/6 Security Headers

Poor

2/3 Legal

Partial

2/2 Web Standards

Complete

100/100 Performance

Fast

Vibe Score 0 · No AI signals

Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (4)

Infrastructure

CDN	Cloudflare
Protocol	HTTP/3

Build & Framework

Build tool	Vite

Analytics & Marketing

Analytics	Cloudflare Web Analytics

Infrastructure

Network

CLOUDFLARENET - Cloudflare, Inc., US

AS13335 · US

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

SSL Certificate

Google Trust Services

Valid 29 May 2026 to 27 Aug 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

14 days

Registered May 2026 · Cloudflare, 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 Not published. Receivers fall back to permissive defaults.

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)

Key	Size	Detected as
number-duel:guest	40 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?

134 ms Server response

85% Faster than peers

320 ms Largest contentful paint

0.00 Cumulative layout shift

104 KB Page weight

2 Third-party domains

0 Console errors

0 Failed requests

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 (64 URLs)

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

? Terms of Service not detected

? Consent manager not detected

Analytics detected; tracking fires without visitor opt-in.

82% unique

Security Headers (0/6)

✗

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

✓ HTML minified

✗ CSS minified

✗ JS minified

2 JS files

1 CSS files

2 Third-party domains

Brand Colours

App Manifest

Number Duel

display: standalone 1 icon

theme #172033

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