Heads-up blackjack against a measured fruit-fly brain. One seat, a queue, and a fly that remembers every hand anyone has ever dealt it.
hit stand double · dot = disagrees with basic strategy
Every round you and the fly each get a hand against the same dealer. You act with the buttons; the fly imagines each of its options, smells which one feels best, and takes it. Whoever does better against the dealer wins the round. Ten rounds a seat.
The fly's brain is 1,200 Kenyon cells, 97 output neurons and 332 dopaminergic neurons from MaleCNS v1.0, wired as measured. A situation becomes a pattern over its projection neurons; winning fires reward neurons, losing fires punishment neurons, and the synapses carrying that pattern are depressed. The brain at this table began as a fly that had played 30,000 hands alone against the dealer; every hand here is one more conditioning trial, and it persists between players.
| condition, 30k hands | winrate |
|---|---|
| untrained | −45% |
| dopamine disconnected | −46% |
| connectome + dopamine | −16% |
It learned don't bust — it stands on nearly everything and hits only on 10 and 11 — and nothing at all about doubling. That is the first thing a person learns at a blackjack table, and it is not basic strategy. The table opened with that 30,000-hand brain, and every hand played here is added to it.