ChessFly

Takes the input wiring of a real mushroom body from FlyWire v783, 285 olfactory projection neurons, 5,177 Kenyon cells and 21,509 connections, and shows it a chessboard instead of odours. Only the Kenyon cell to output neuron synapses change, under a dopamine-like prediction error, and the fly teaches itself by self-play in a browser tab: by 5,000 games it prices a knight at 3.1 and a queen at 11.0 pawns unprompted. The headline is negative: the measured wiring rates 1690 against 1695 for the same cells with inputs shuffled, and the earlier all-random design is about 60 points stronger.

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#chess#mushroom-body#kenyon-cells#self-play#dopamine#shuffled-control#flywire