CAPT bioCAPT Chess Arena
A proof-visible chess surface: chess.js enforces legal moves, Cloudflare calls sealed bioCAPT WASM, and every bioCAPT move exposes hashes, rejected claims, and a downloadable game manifest.
White to move
Backend checking
Arena Mode
You play White. bioCAPT ranks legal Black moves through the Worker.
Controls
Select a white piece to move.
Position Lab
Cloudflare Worker
Checking backend.
Proof Trace
CAPT WASMunknown
bioCAPT WASMunknown
Selected Movenone
Trace Hashnone
Legal Moves0
bioCAPT Signalnone
Unsupported claims remain rejected.