OPUS CHESS · Every book fixes one thing you keep getting wrong

This site was found by StackScope Discovery, our own first-party launch detection. The tech stack below comes from that discovery scan; the full analysis (screenshots, scores, page checks) is added when the site is picked up by a launch platform.

Not another general chess course. Focused books, each written against a single specific failure, the won position you threw away, the opening you never understood, the endgame you drew. Pick the three that describe your last ten losses.

Education

Added August 19, 2026 · Last analysed August 19, 2026 · via StackScope Discovery

Own this Launch?

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one to detect its tech stack. This page is what we saw on 19 August 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

Tech Stack (7)

Infrastructure

CDN	Cloudflare
DNS	Cloudflare DNS
Protocol	HTTP/3

Build & Framework

CMS	Osclass
CSS framework	Tailwind CSS
JavaScript library	Motion
Meta-framework	Astro medium

Security Headers (2/6)

✗

Strict-Transport-Security

✗

Content-Security-Policy

✗

X-Frame-Options

✓

X-Content-Type-Options

✓

Referrer-Policy

✗

Permissions-Policy experimental (check browser support)

–

X-XSS-Protection deprecated (use Content-Security-Policy)

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.