Fly Dino

The original Chromium Dino game played through an 80-cell measured MaleCNS circuit: eight engineered observations feed the fixed cells, 16 descending-cell activities feed a 16-12-3 readout, and only that 243-parameter readout is trained, using the cross-entropy method over 80 generations and 15,680 episodes. The published checkpoint clears 99/100 held-out 180-second courses; the same readout with the circuit silenced clears 0/100. The author states this shows learned control and dependence on circuit activity, not that biological topology is better.

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