Provably fair · USDT, BTC, SOL
HiLo
A card is face-up. Guess whether the next is higher or lower. Each correct guess grows the multiplier; cash out before a wrong guess ends the round.
Play HiLoAbout
HiLo is a streak-builder. The deck cycles through 52 cards; on each step, the per-direction multiplier is published based on the visible card and the remaining deck composition. Wrong guess ends the round; cash out keeps the streak.
How a round plays
- Place a bet; the first card is revealed.
- Choose Higher or Lower for the next card. The per-direction multiplier is shown before you choose.
- Correct: the multiplier compounds and the next card flips. Wrong: round ends.
- Cash out any time to lock in stake x current multiplier.
Provably fair
- Each card draw is derived from HMAC-SHA256(server_seed, client_seed || nonce) without replacement.
- Server seed is committed before the round, revealed after you rotate.
- After rotation, the verifier reproduces the exact card sequence from your seed pair + nonce.
Every round is verifiable from a server seed (revealed after rotation), your client seed, and a per-round nonce. See how it works for the full construction.