Orientation-match gate solved faster than a human can scan a reference plus N candidates
bh.arena_match_superhuman · convicts
What it catches
Kitsune arena ORIENTATION-MATCH gate (arena/match.go) — the Arkose 'faces the same way' / hCaptcha 'which go together' family, reproduced as owned infra (no clone/asset). A reference arrow + N candidate arrows are rendered at DISTINCT orientations, exactly one matching the reference; the client clicks the match. This is a RELATIONAL task — you must compare the reference against each candidate, not classify one tile — and per-tile centre/tone jitter + noise means the matching candidate is NOT pixel-identical to the reference, so a hash-match shortcut fails and real orientation reasoning is required (the answer index is server-side). SERVER-OBSERVED tell: SUPERHUMAN SPEED — the whole solve (age, issue->verify) faster than (N+1) * matchPerTileMs (250ms), the time a human needs to look at the reference plus each candidate. A bot / VLM classifies every tile's orientation and answers instantly; a human scans and compares. anomaly:match_superhuman -> the detector relay (/arena/match/verify) joins it to ks_sid so a PASS is CONVICTED on coherence (the arena thesis: the solve-BEHAVIOUR discriminates, not the puzzle). The relational-reasoning twin of the classification superhuman-floor (bh.arena_captcha_superhuman) and the sequence/locate speed tells. FP-SAFE BY CONSTRUCTION: the floor bounds human relational-scan time (hardware-independent — it is about visual comparison, not device speed); a human comparing orientations over N tiles always exceeds it. EXPERIMENTAL (w0.85, calibration: widen matchPerTileMs if a fast human on the easy 4-tile level is seen near the floor). Test both directions: an instant VLM/heuristic match (age << (N+1)*250) convicts; a human scanning the candidates at a normal pace is silent.
Signals it reads
behavioral.arena_match_superhuman
How it fires
present
Bypassed by 10
Frontier evaders that reach the detector uncaught (scored only suspicious, defeating every convicting tell) — this check is not one that stops them. The red-team frontier this detection still has to convict.