How to use it
Use this workbench for a small event draw where one remaining participant receives one remaining prize unit.
- Enter one unique participant per line.
- Enter each prize as label or label | quantity, then start the draw.
- Review the paired winner and prize; continue until either pool is empty or reset.
Worked example
- Input
Participants: Ada, Bo
Prizes: Gold | 2, Silver | 1
- Output
Bo — Gold · 1 participant and 2 prize units remain
Participants are uniform; each remaining prize unit is uniform, so quantity controls prize probability.
Method and definitions
- The participant index and prize-unit ticket are two separate rejection-sampled Web Crypto selections.
- A winner is removed and the selected prize quantity is decremented only after a successful draw.
Limits and edge cases
- Supports up to 500 unique participants, 100 prize types, and 10,000 total prize units.
- It does not verify identities, ticket eligibility, legal promotion rules, or the integrity of the device.
Privacy
Entries, dates, times, and results remain in this tab. Rigula does not upload them or add them to the URL.
Sources
