Provably fair bingo

How to play

strategy

BINGOChain is bingo you can't cheat at. Boards are sealed before the game and the winner is proven by replaying every move on-chain.

  1. 1

    Join an arena

    Pick an open arena and stake $LANCE. You get a random 5×5 board — but only its fingerprint (a hash) is sealed on-chain, not the board itself.

  2. 2

    Call numbers in turn

    Players take turns calling numbers 1-25. Every call is recorded on-chain, so the whole game is public and replayable.

  3. 3

    Hit BINGO

    Mark called numbers on your board. Complete 5 lines — any rows, columns, or diagonals — then claim BINGO.

  4. 4

    Reveal your board

    After the round you reveal your real board and its secret salt. The contract checks it matches the fingerprint you committed at the start.

  5. 5

    Win in $LANCE

    The winner is confirmed by replaying the game on-chain — no trust required — and the prize pool pays out in $LANCE.

Provably fair

When you join, only a hash of your board goes on-chain. You reveal the real board afterward and the contract verifies it against that hash — so no one can swap cards or fake a win. Cheating isn't blocked by a referee; it's mathematically impossible.

Enter the lobby →Create an arena