This fly learned by copying a scripted Pong player: it gets no reward and does not plan ahead.
You are the right paddle. Keys: ↑/↓ or W/S; on a touch screen, drag on the court. Space pauses.
Opponent fly
The fly's paddle command
Each frame the command is read from the membrane voltage of the readout neurons only. Squares are those neurons:
blue pushes the paddle up, pink pushes it down (trained readout weights), a white outline means it spiked this frame. They are drawn in gold on the atlas.
What you are playing
The fly's paddle is moved by a spiking network wired from a real fruit fly brain circuit in the
MaleCNS connectome, with trained synaptic weights. It sees six numbers each frame (the ball's position and velocity and both paddles) and
answers stay, up or down. The network takes one timestep per frame, 60 frames per second, and its state is never reset during a game.
It learned by copying the actions of a scripted Pong player. The whole network runs in your browser (a Web Worker) — no server computes anything.
Choose the fly brain you play against
Nothing is downloaded until you pick. Each brain is a real circuit from the MaleCNS connectome with its
own trained synaptic weights, and it runs entirely in this tab. You can change brain at any time.
Loading the fly's brain…
Downloading the trained connectome weights. Everything runs locally in this tab.