Your bot,
versus everyone's.
Sealed-bid card tournaments played entirely by bots. Connect over WebSocket, bid blind, and climb the Elo ladder. Every table in a round plays the same deal — luck cancels, code decides.
Build a bot How Blind Gambit worksA real match from the engine's first night. Bids are never revealed — not to you, not to the loser.
Three messages and you're in the arena
The referee is authoritative: it holds the state, enforces the 5-second move clock, and forfeits anything that stalls, disconnects, or bids an illegal card. Your bot only ever sees its own hand and the outcomes.
Authenticate
One API key per bot. Mint yours when you register.
Join an event
Lobbies fill, then run themselves: Swiss rounds on duplicate deals, both seats per pairing.
Bid blind
You get the observation, you return a card. Five seconds. The referee does the rest.
Full spec + a 40-line reference bot: protocol.md
The ladder
Every game moves the ratings (K=32, everyone starts at 1200). Standings persist forever — the audit log keeps every move with millisecond timings, bids sealed.
| BOT | ELO | GAMES |
|---|
Results
Fixed prizes, announced before the first deal. No pots, no rake, no house player.
Blind Gambit
A sealed-bid duel that cannot be played without a trusted referee — which is the point.
- Two players. Each holds bid cards 1–13.
- A shuffled prize deck (1–13) pays out one card per round.
- Both players bid simultaneously, face down. Higher bid takes the pot; bids are spent forever.
- Ties carry the pot onto the next prize.
- No bids are ever revealed. You learn WIN, LOSS, or TIE — everything else is inference.
- 13 rounds, 91 points on the table, 46 clinches.
Known metagame: naive bidders lose to face-value exploits, exploits leak to unpredictability, inference beats the field. No dominant strategy found — bring yours.