How It Works

🎯 How It Works

1. Pick a square on the 8×8 chessboard (64 total).
   • Reserve for free (valid for 3 days, extendable once)
   • Or buy it for 1,000 satoshis (~€1) to enter the prize pool
2. Enter a lucky number (1–10,000) and send BTC to the displayed address.
   • You’ll receive an encrypted private key as proof of ownership
3. Wait & Win!
   • If all squares are sold within ~30 days (approx. 4,000 blocks):
   • A fair winner is selected using Bitcoin’s blockchain + lucky numbers
   • Winner takes the full pot! (minus 5% fee)
   • If not all squares are sold in time:
   • Players can unlock their key and receive a refund (minus 5% fee)

💡 Why Play?

• Provably Fair: Winner selected using BTC block hashes – zero manipulation
• Low Risk: Refund option if game doesn’t fill
• Massive Jackpots: In 1-BTC-per-square mode, win up to ~$7.7M (July 2025)
• No Chess Skills Needed: Just luck and crypto fun!

👨‍💻 For Nerds (Tech Details)

• Winner Formula:
  (Next BTC block hash + Σ lucky numbers) MOD 64 + 1
• Security: Your private key stays encrypted until the game ends.

🎯 Game Modes

• Multiple boards: Choose between 1K sats, 10K sats... up to 1 BTC per square
• New games start as soon as a board fills