FlexiChess
Ask the games — 10.4M+ game database search (in seconds), opponent scouting, FSRS training, and a workbench you arrange yourself.
Added September 1, 2026
· Last analysed September 1, 2026 · via 
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 for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 1 September 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.
FlexiChess looks production-ready overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Worth fixing first: missing several security headers and incomplete email security.
Launched on Product Hunt on September 1, 2026. The site is hosted on OpenNext and served through Cloudflare, with a domain registered 12 weeks before launch. We've detected 14 technologies on this site, covering auth, CDN, CSS frameworks, and developer tools. The stack includes Clerk, Next.js, and React.
It's running the same core stack as 1,030 other launches.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (14)
| CDN |
Cloudflare
(2)
|
| DNS |
Cloudflare DNS
|
| Hosting |
OpenNext
|
| Protocol | HTTP/3 |
| Security |
Cloudflare Bot Management
|
| Business email |
Google Workspace
(3)
|
| Transactional email |
Resend
|
| Auth |
Clerk
(4)
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Rspack
|
| Framework |
React
|
| JavaScript library |
Zod
|
| Meta-framework |
Next.js
(4)
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Storage (45)
| Name | Lifetime | Detected as |
|---|---|---|
| cf_clearance | 1y | Cloudflare |
| _cfuvid | session | Cloudflare |
| __cf_bm | < 1h | Cloudflare |
| __client | 1y | Clerk |
| __client_uat | 1y | Clerk |
| __client_uat_YjE0YmXG | 1y | Clerk |
| Key | Size | Detected as |
|---|---|---|
| gmw:coachWelcomeIndex | 2 B | - |
| gmw_auto_insert_evaluations | 1 B | - |
| gmw_best_move_arrow | 1 B | - |
| gmw_board_theme | 7 B | - |
| gmw_center_search_split_pct | 2 B | - |
| gmw_cockpit_strip_layout_v1 | 330 B | - |
| gmw_db_search_enabled_v1 | 22 B | - |
| gmw_engine_backend | 5 B | - |
| gmw_engine_hash_mb | 2 B | - |
| gmw_engine_infinite | 1 B | - |
| gmw_engine_multipv | 1 B | - |
| gmw_engine_threads | 1 B | - |
| gmw_explorer_default_source | 6 B | - |
| gmw_explorer_lichess_ratings | 14 B | - |
| gmw_explorer_lichess_speeds | 21 B | - |
| gmw_explorer_masters_elo | 4 B | - |
| gmw_explorer_player | 0 B | - |
| gmw_explorer_player_color | 5 B | - |
| gmw_freeform_by_workbench_v1 | 4 KB | - |
| gmw_home_tournaments_v1 | 928 B | - |
| gmw_layout_columns_v3 | 118 B | - |
| gmw_layout_panels | 251 B | - |
| gmw_layout_sync_meta_v1 | 73 B | - |
| gmw_line_autoplay_ms | 3 B | - |
| gmw_live_games_auto_refresh_ms | 6 B | - |
| gmw_live_games_expanded_state | 1 B | - |
| gmw_local_scope_registry_v1 | 65 B | - |
| gmw_notation_movetext_style | 5 B | - |
| gmw_opening_book_col_widths_v12 | 56 B | - |
| gmw_overlay_tabiya_stats_v1 | 69 B | - |
| gmw_piece_style | 8 B | - |
| gmw_search_results_columns_v1 | 155 B | - |
| gmw_workbench_last_active_v1 | 13 B | - |
| gmw_workbench_layout_ui_v1 | 105 B | - |
| gmw_workbench_sessions_v1 | 1.1 KB | - |
| __clerk_environment | 6.3 KB | Clerk |
| Database | Version | Detected as |
|---|---|---|
| gmw_custom_engines | 1 | - |
| gmw_quick_view_drafts | 1 | - |
| gmw_user_data | 10 | - |
Readiness Breakdown How?
Performance How?
⚠ 2 images: 2 oversized, 2 missing alt text
Broken first-party requests (2), worth fixing
- 401 /api/repertoire/sessions
- 401 /api/training/srs-summary?tzOffset=0
Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI copy signals | +5 |
| AI palette signals | +5 |
| AI writing signals | +5 |
| AI asset signals | +10 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.