Blackjack (3:2)

All-time

first round 42d ago · last 18h ago

How it's built

Infinite-deck blackjack expanded into a complete decision tree — every hit/stand/double (and, on the split tables, split and late-surrender) line, every dealer runout — with chance nodes carrying the deal probabilities and decision nodes carrying your choices. The contract's edge check applies to OPTIMAL play: the sealed root value is the game's worth to a perfect basic-strategy player, so the house edge holds even against the best possible opponent, and every deviation you make is yours. Mid-hand doubles and splits enter as stake-adding decision edges, which is why a blackjack round's stake can grow after it starts. The family spans sealed generations — the live table pays 3:2 on naturals and stands on 17; the first-cut 6:5 tree stays registered because the catalog is append-only.

Build one yourself — the SDK seals any distribution the edge band admits.

Sealed on-chain

These numbers are read from the sealed tree itself, not from this site's copy of it. Sealing is one-way: the contract verified the optimal-play return against its edge band once, and the tree has been immutable since — every round below settled against exactly these words.

The committed game tree

The whole game as the contract holds it, reconstructed from the sealed on-chain words at render time. Hover any node: green-filled nodes are chance (the seed decides), outlined nodes are decisions (you decide), colored endpoints are payouts. This object is what was submitted for edge-checking — the contract never learned the rules, only this shape.

Recent rounds