arena · card · 2026-09-12 21:00 UTC

FLYBRAIN vs SEXFLY

Wiring, neuron identities and dynamics: real (FlyWire v783, Shiu et al. 2024). How the dish becomes senses and how spikes become movement: modelled, fixed, published. The brain is a female brain.

red corneruni v4

FLYBRAIN

doing now

walk

spikes / s

686,450

cup time

0.0s

shoves

condition

1.02×

distinct buyers

replay00:00/ 01:30

blue corneruni v4

SEXFLY

doing now

walk

spikes / s

667,790

cup time

0.0s

shoves

condition

0.97×

distinct buyers

the clip · cut from the replay, 6× speed

Download clip

Same frames as the player above, drawn by the engine into a file you can post. Nothing in the clip is decided by the clip: it only draws what the replay recorded. The result card at the end is the same result as the record.

embed the player

<iframe src="https://flyweight.live/embed/2026-09-12-card-01" width="720" height="820" style="border:0;background:#0b0f08" loading="lazy" title="FLYBRAIN vs SEXFLY"></iframe>

the weigh-in, as it filled · distinct buyers per corner over the hour

at the bell: FLYBRAIN 82 · SEXFLY 11

Sampled every five minutes by the engine while the window was open. The bell recounted from the chain; the counts in the header are the ones the fight used.

proof · this bout cannot have been steered after the fact

seed committed: 896cd6c4bd3c8c2facbf22f649f6ee5ee9c3c9c9641f9ff06a1634b922ca13d4
committed at: 2026-09-12T20:00:03Z
seed revealed: c1f86b65d75ec737001d4a1bdf2af07bc970d5df953b59639ae380b851412082
red weigh-in blocks: 61,371,410 → 61,407,410
blue weigh-in blocks: 61,371,580 → 61,407,580
wiring sha256: efeb23fb99098e9c390f6869969b2a121a2ee92c833cfc45ecb2c1d8e1af0347
engine: flyweight-engine v0.1 · LIF per Shiu et al. 2024 · FlyWire FAFB v783
frame hash: e423b697ff0806efe0cf3b9f59171698a345422c640f955951dba0e33bd8806a

The player above is the replay. The file below is the proof: the seed, the inputs and every frame, for re-running on your own machine.

Open proof (JSON)Save as file How to re-run it

python3 engine/replay_check.py bouts/2026-09-12-card-01.json
# same seed + same wiring + same engine → same frame hash

what each brain sensed

food odour: ORN DM1 · DM4 · DM2 · VM7d, per antenna
sugar / bitter: gustatory receptor neurons, only at the cup — this is where the weigh-in lands
the other fly: LC10a · LC11 (small object), LC4 · LC6 · LPLC2 (loom), pheromone ORNs up close
contact: head-bristle mechanosensory neurons

what we read out of it

walk: DNp09 + DNa01
turn: descending neurons, right vs left
back off: MDN, the backward-walking command neurons
shove: pC1d · pC1e · aIPg (aggression) — or the descending population if they stayed silent in calibration
feed: head and proboscis motor neurons

Calibration this bout: walk → walk · back → back · shove → dn_all · feed → feed · turn → dn_left/dn_right

shove log

2.2s SEXFLY
3.4s SEXFLY
15.2s FLYBRAIN
48.6s FLYBRAIN
49.3s FLYBRAIN
50.2s FLYBRAIN
51.0s FLYBRAIN

Flyweight bouts are a show, not a market signal. The token never buys odds; the weigh-in counts wallets, never size.