Observed arrival · 2026-09-29
Castle: chess you can walk around
A browser-based chess club with rated matchmaking, pass-and-play, and five AI opponents that comment on their moves.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Browser chess players seeking casual or rated games
- Worth noticing
- Rated matchmaking starts within ±200 points and widens its search every 10 seconds.
Field notes
The matchmaking description gives a concrete search rule: it begins within ±200 rating points and expands every 10 seconds. Pass-and-play is designed for one shared device, with the board turning toward the player whose turn it is and undo available to either player. The page also says Stockfish runs in the browser and credits its engine license as GPL v3.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue