Ordered click-in-sequence gate solved faster than human target-location or at a metronomic cadence
bh.arena_seqclick_superhuman · convicts
What it catches
Kitsune arena ORDERED CLICK-IN-SEQUENCE gate (arena/sequence.go) — the GeeTest icon-order / NetEase Yidun family, reproduced as owned infra (no clone/asset). N numbered tiles are placed at shuffled positions; the client must click them in numeric order. The order is PUBLIC (shown) — the task is the ordered CLICKING (visual-search + motor sequence), not guessing a secret, so the solve-BEHAVIOUR discriminates (the arena thesis). TWO SERVER-OBSERVED prongs: (1) SUPERHUMAN SPEED — the whole solve (SERVER-OBSERVED age, issue->verify) is faster than N * seqPerTargetMs (250ms), a conservative floor on the time a human needs to visually locate the next numbered tile (saccade) and move+click it. A bot that clicks all N tiles at their known coordinates instantly finishes in tens of ms; a human cannot locate+click N scattered ordered targets that fast. (2) METRONOMIC CADENCE — the std of the inter-click intervals below seqCadenceFloorMs (15ms), judged only when per-click timestamps were reported and N>=3: a fixed-delay clicker fires at a constant interval while a human's inter-click gaps vary with each target's distance. Either prong -> anomaly:seqclick_superhuman; the detector relay (/arena/sequence/verify) joins it to ks_sid so a PASS is CONVICTED on coherence. The visual-search+ordering twin of the motor-precision (bh.arena_timing_superhuman) and hold-dynamics (bh.arena_hold_robotic) gates. FP-SAFE BY CONSTRUCTION: the age prong floor sits well under human locate+click time (load-bearing, hardware-independent — it bounds human VISUAL-SEARCH time, not device speed); the cadence prong is corroborating and only judged when times are present. EXPERIMENTAL (w0.85, calibration: widen seqPerTargetMs if a very fast human on the easy 3-tile level is seen near the floor). Test both directions: an instant all-at-once clicker (age << N*250) or a metronomic clicker convicts; a human who visually searches and clicks each in order at a varied pace is silent.
Signals it reads
behavioral.arena_seqclick_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.