Blackjack 51 · two spots.
Research ↗Play two hands at one table, the way people do at a casino. Both spots are dealt face up, so you see the second hand before you play the first. The classic single-hand table, with the Ⅰ peek and the next-hit market →
Blackjack pays 3:2 · Riemann stands on all 17s
Table log · hand history
Your last 100 rounds at this table, newest first: Riemann’s hand, every spot and split hand, each decision, and the receipt ids posted to the shared bank.
Research · Rule Card
BLACKJACK 51 / TWO SPOTS · LIVE RULE CARD · v1
Two spots, one shoe, every hand face up.
This table deals the same game as the classic Blackjack 51 table, by the same rules, with a second spot. At a casino many players play more than one spot, and every hand at the table is dealt face up; seeing the second hand can change how you play the first. Riemann AI deals by a fixed published rule and prompts; it never chooses for you.
The rules
- The shoe is the Area 51 deck: 51 cards, with 2♣ held aside as the declared marker Ⅰ, shuffled from a seed with the classic table’s method. A fresh shoe starts when fewer than 12 cards per hand in play remain (36 for two spots and the dealer).
- Set a stake of 1, 2, 4 or 8 jbits on each spot, or sit a spot out. Both stakes leave your shared Area 51 bank when you deal.
- Dealing goes one card to spot 1, one to spot 2, Riemann’s up card, a second card to each spot, then Riemann’s hole card, face down.
- If Riemann has blackjack, it is shown at once: a player blackjack pushes and every other hand loses. Otherwise a natural (an unsplit ace and ten-value card) pays 3:2.
- Spot 1 plays first, then spot 2. Hit, stand or double: double on your first two cards to add the same stake, take exactly one card and stand.
- Split once per spot when the first two cards have the same blackjack value, including different ten-value faces. Both split hands take their second card at once, as at the classic table; split aces take one card each; a split 21 is an ordinary 21. A split spot finishes both hands before the next spot plays.
- Riemann then turns the hole card and draws below 17, standing on every 17, but only if some hand is neither bust nor a natural. Closest to 21 without going over wins even money; equal totals push.
- If a round ever runs the shoe dry, the cards not on the table are shuffled into a continuation shoe by the same seeded method.
The classic table’s Ⅰ peek, next-hit market, open table and rule settings stay there; this table plays the default rules only. The complete table engine is published here.
Status
| Claim | Status | Where |
|---|---|---|
| With one spot, this engine deals, plays and pays exactly as the classic engine v2.0.0 | COMPUTED | 65,016 seeded rounds, all rule settings, compared card for card; verifier · receipt |
| Two to five spots: casino deal order, one split per spot, the dealer rule, exact accounting to the cent | COMPUTED | 20,000 seeded rounds and a continuation-shoe fixture; finite tests, not a proof |
| The classic Blackjack 51 engine is unchanged | COMPUTED | its SHA-256 matches the v3.2 release |
| Riemann’s rule, or any strategy here, is optimal | not claimed | a fixed dealer rule, as at a casino |
Limits
The table runs entirely in your browser, including the shoe order, so it is a rules exhibit rather than a secure game. Rounds are played for jbits in the shared Area 51 bank; jbits have no monetary value. A round left open is saved with the bank and resumes where it stopped. Seating a second person at an online Blackjack table is not part of this release.