A roll from 1 to 100, and you choose how likely you are to win. Drag the gold tag along the track (or use the arrow keys): the mint part of the track is the rolls that win, the coral part the rolls that lose. A small chance pays a lot, a big chance pays a little, and every setting keeps the same 97% return.

Roll under wins on the low end, Roll over on the high end: swap with Under ⇄ Over under the track (or Q), the chance stays the same. The roll is shown exactly as the Provably fair page replays it: with a 37% chance, ≤ 37 wins on rolls 1 to 37 and ≥ 64 wins on rolls 64 to 100. Auto rolls as many times as you like, with a stop at a profit or a loss.

Every roll comes from your own provably fair seed pair the moment your bet is placed, never before. Check any roll on the Provably fair page.