🐂 牛牛 (Niu Niu)

Real-time multiplayer Chinese card game (Bull Bull).

Features

• Multiplayer - Up to 10 players per room
• Real-time - WebSocket-based with instant updates
• Mobile-friendly - Responsive poker table UI
• Card animations - Smooth dealing effects

Hand Rankings

1. 五小牛 (5 cards ≤10 total) - 5x
2. 炸弹牛 (Four of a kind) - 4x
3. 同花顺牛 (Straight flush) - 4x
4. 五花牛 (All face cards) - 3x
5. 顺子牛 (Straight) - 3x
6. 同花牛 (Flush) - 3x
7. 双五牛牛 (Niu Niu with 5+5 points) - 3x
8. 牛牛 (Bull Bull) - 2x
9. 牛7-牛9 - 2x
10. 牛1-牛6 - 1x
11. 无牛 (No Bull) - 1x

Special Rules

• 3⇄6 Swap - 3 can count as 6 and vice versa (configurable)
• Banker wins ties - Same score = banker wins (configurable)

Setup

npm install
npm start

Server runs on http://localhost:3000

How to Play

1. Create a room (you become the banker)
2. Share the 4-letter room code with friends
3. Players join and set their bet amount
4. Banker clicks "发牌" (Deal) when ready
5. Cards are dealt and results shown instantly
6. Banker clicks "下一轮" (Next Round) to continue

Configuration

Banker can access settings (⚙️) to configure:

• 庄家通吃 - Banker wins ties
• 3⇄6 互换 - Enable 3/6 swap rule
• Min/Max bet amounts

Tech Stack

• Node.js + Express
• Socket.io for real-time communication
• Vanilla JS frontend

License

MIT